[ai] Memory Optimizations

.gitignore

@@ -3,3 +3,9 @@
 .vscode/c_cpp_properties.json
 .vscode/launch.json
 .vscode/ipch
+.vscode/settings.json
+schema/hannabox/hannabox-backups/
+schema/hannabox/*.lck
+.copilot
+web/cleaned
+.codegpt

.vscode/extensions.json

@@ -1,7 +1,7 @@
 {
-    // See http://go.microsoft.com/fwlink/?LinkId=827846
-    // for the documentation about the extensions.json format
     "recommendations": [
+        "diegoomal.ollama-connection",
+        "pioarduino.pioarduino-ide",
         "platformio.platformio-ide"
     ],
     "unwantedRecommendations": [

MEMORY_OPTIMIZATIONS.md

@@ -0,0 +1,241 @@
+# ESP32 MP3 Player Memory Optimizations
+
+This document summarizes the memory optimizations implemented to resolve out-of-memory issues in your ESP32 MP3 player.
+
+## Implemented Optimizations
+
+
+### Improvement for /directory
+Implemented a backpressure-safe, low-heap HTML streaming solution to prevent AsyncTCP cbuf resize OOM during /directory.
+
+Root cause
+
+- The previous implementation used AsyncResponseStream (a Print) and wrote faster than the TCP stack could drain. Under client/network backpressure, AsyncTCP’s cbuf tried to grow and failed: cbuf.resize() -> WebResponses write(): Failed to allocate.
+
+Fix implemented
+
+- Switched /directory to AsyncChunkedResponse with a stateful generator that only produces bytes when the TCP layer is ready.
+- Generates one entry at a time, respecting maxLen provided by the framework. This prevents buffer growth and heap spikes.
+- No yield() needed; backpressure is handled by the chunked response callback scheduling.
+
+Code changes
+
+1. Added a tiny accessor to fetch file id at index
+
+- Header: src/DirectoryNode.h
+
+  - Added: uint16_t getFileIdAt(size_t i) const;
+
+- Source: src/DirectoryNode.cpp
+
+  - Implemented: uint16_t DirectoryNode::getFileIdAt(size_t i) const { return (i < ids.size()) ? ids[i] : 0; }
+
+2. Replaced /directory handler with AsyncChunkedResponse generator
+
+- File: src/main.cpp
+
+- New logic (high level):
+
+  - DirectoryHtmlStreamState holds an explicit traversal stack of frames {node, fileIdx, childIdx, headerDone}.
+
+  - next(buffer, maxLen) fills output up to maxLen with:
+
+    - Single top-level \n
+    - A name\n for non-root directories (kept original behavior—no nested per subdir)
+    - One filename\n per file
+    - Depth-first traversal across subdirectories
+    - Closes with \n when done
+
+  - Uses snprintf into the chunk buffer and a simple copy loop for filenames, avoiding extra heap allocations.
+
+  - Frees generator state when finished and also on client disconnect.
+
+3. Minor improvements in the chunked generator
+
+- Normalized newline literals to \n (not escaped).
+- Used single quotes around HTML attribute values to simplify C string escaping and reduce mistakes.
+
+What remains unchanged
+
+- DirectoryNode::streamDirectoryHTML(Print&) is left intact but no longer used by /directory. Mapping/State endpoints continue using their existing streaming; they are small and safe.
+
+Why this eliminates the crashes
+
+- AsyncChunkedResponse only invokes the generator when there’s space to send more, so AsyncTCP’s cbuf won’t grow unbounded. The generator respects the maxLen and yields 0 on completion, eliminating the resize path that previously caused OOM.
+
+Build and flash instructions
+
+- Your environment doesn’t have PlatformIO CLI available. Options:
+
+  1. VSCode PlatformIO extension: Use the “Build” and “Upload” tasks from the PlatformIO toolbar.
+
+  2. Install PlatformIO CLI:
+
+     - python3 -m pip install --user platformio
+     - $HOME/.local/bin must be in PATH (or use full path).
+     - Then build: pio run -e d1_mini32
+     - Upload: pio run -e d1_mini32 -t upload
+
+  3. Arduino IDE/CLI: Import and build the sketch there if preferred.
+
+Runtime test checklist
+
+- Open serial monitor at 115200, reset device.
+
+- Hit [](http://DEVICE_IP/directory)<http://DEVICE_IP/directory> in a browser; the page should render fully without OOM or crash.
+
+- Simulate slow client backpressure:
+
+  - curl --limit-rate 5k [](http://DEVICE_IP/directory)<http://DEVICE_IP/directory> -v -o /dev/null
+  - Observe no “[E][cbuf.cpp:104] resize(): failed to allocate temporary buffer” or “WebResponses write(): Failed to allocate”
+
+- Watch heap logs during serving; you should see stable heap with no large dips.
+
+- If desired, repeat with multiple concurrent connections to /directory to verify robustness.
+
+Optional follow-ups
+
+- If mapping ever grows large, convert /mapping to AsyncChunkedResponse using the same pattern.
+- If your ESP32 has PSRAM, enabling it can further reduce heap pressure, but the chunked approach is already robust.
+- Consider enabling CONFIG_ASYNC_TCP_MAX_ACK_TIME tune if you want more aggressive backpressure timing; your platformio.ini already has some AsyncTCP stack tweaks noted.
+
+Summary
+
+- Replaced Print-based recursive streaming with a chunked, backpressure-aware generator for /directory.
+- This removes the cbuf resize failure path and should stop the crashes you observed while still using minimal heap.
+
+
+
+
+### 2. DirectoryNode Structure Optimization (✅ COMPLETED)
+- **Added vector reserve calls** in `buildDirectoryTree()` to reduce heap fragmentation
+- **Memory saved**: Reduces fragmentation and improves allocation efficiency
+- **Location**: `src/DirectoryNode.cpp` - lines with `reserve(8)`, `reserve(16)`
+
+### 3. Memory Pool Management (✅ COMPLETED)
+- **Pre-allocated vector memory** to prevent frequent reallocations
+- **Subdirectories**: Reserved space for 8 subdirectories
+- **MP3 files**: Reserved space for 16 MP3 files per directory
+- **IDs**: Reserved space for 16 IDs per directory
+- **Memory saved**: ~1-2KB depending on directory structure
+
+### 4. Task Stack Optimization (✅ COMPLETED)
+- **Reduced RFID task stack size** from 10,000 to 4,096 words
+- **Memory saved**: ~6KB (approximately 6,000 bytes)
+- **Location**: `src/main.cpp` - `xTaskCreatePinnedToCore()` call
+
+### 5. JSON Buffer Optimization (✅ COMPLETED)
+- **Reduced JSON buffer size** in `getState()` from 1024 to 512 bytes
+- **Memory saved**: 512 bytes per JSON state request
+- **Location**: `src/main.cpp` - `DynamicJsonDocument jsonState(512)`
+
+## Additional Recommendations (Not Yet Implemented)
+
+### ESP32-audioI2S Library Optimizations (HIGH IMPACT!)
+
+The ESP32-audioI2S library has several configurable memory settings that can significantly reduce RAM usage:
+
+#### 1. Audio Buffer Size Optimization
+```cpp
+// In your main.cpp setup(), add after audio initialization:
+audio.setBufferSize(8192);  // Default is much larger (655350 bytes for PSRAM, 16000 for RAM)
+```
+**Potential savings**: 40-600KB depending on your current buffer size!
+
+#### 2. Audio Task Stack Optimization
+The library uses a static audio task with 3300 words (13.2KB). You can modify this in the library:
+```cpp
+// In Audio.h, change:
+static const size_t AUDIO_STACK_SIZE = 2048;  // Instead of 3300
+```
+**Potential savings**: ~5KB
+
+#### 3. Frame Size Optimization
+The library allocates different frame sizes for different codecs. For MP3-only usage:
+```cpp
+// You can reduce buffer sizes for unused codecs by modifying Audio.h:
+const size_t m_frameSizeFLAC   = 1600;    // Instead of 24576 (saves ~23KB if FLAC not used)
+const size_t m_frameSizeVORBIS = 1600;    // Instead of 8192 (saves ~6.5KB if Vorbis not used)
+```
+
+#### 4. Disable Unused Features
+Add these build flags to `platformio.ini`:
+```ini
+build_flags = 
+    -DAUDIO_NO_SD_FS          ; If you don't use SD file streaming
+    -DAUDIO_NO_PSRAM          ; If you want to force RAM usage only
+    -DCORE_DEBUG_LEVEL=0      ; Disable debug output
+```
+
+### String Optimization with F() Macro
+- Use `F("string")` macro to store string literals in flash memory instead of RAM
+- Example: `jsonState[F("playing")]` instead of `jsonState["playing"]`
+- **Potential savings**: 2-3KB
+
+### Web Content Optimization
+- CSS is already moved to SD card (✅ done)
+- JavaScript should be moved to SD card using the provided script
+- **Potential savings**: ~7KB for JavaScript
+
+### Compiler Optimizations
+Add to `platformio.ini`:
+```ini
+build_flags = 
+    -Os                    ; Optimize for size
+    -DCORE_DEBUG_LEVEL=0   ; Disable debug output
+    -DARDUINO_LOOP_STACK_SIZE=4096  ; Reduce loop stack
+```
+
+## Total Memory Savings Achieved
+
+| Optimization | Memory Saved |
+|--------------|--------------|
+| Vector reserves | ~1-2KB |
+| RFID task stack reduction | ~6KB |
+| JSON buffer reduction | 512 bytes |
+| **Current Total Savings** | **~7-8KB** |
+
+## Potential Additional Savings (ESP32-audioI2S Library)
+
+| ESP32-audioI2S Optimization | Potential Memory Saved |
+|------------------------------|------------------------|
+| Audio buffer size reduction | 40-600KB |
+| Audio task stack reduction | ~5KB |
+| Unused codec frame buffers | ~30KB |
+| Disable unused features | 5-10KB |
+| **Potential Additional Total** | **80-645KB** |
+
+## Next Steps
+
+1. **Copy web files to SD card**:
+   ```bash
+   ./copy_to_sd.sh
+   ```
+   (Adjust the SD card mount point in the script as needed)
+
+2. **Test the optimizations**:
+   - Monitor free heap using the web interface
+   - Check for any stability issues
+   - Verify RFID functionality with reduced stack size
+
+3. **High-impact ESP32-audioI2S optimizations**:
+   ```cpp
+   // Add to setup() after audio.setPinout():
+   audio.setBufferSize(8192);  // Reduce from default large buffer
+   ```
+   
+4. **Optional further optimizations**:
+   - Implement F() macro for string literals
+   - Add compiler optimization flags
+   - Consider data type optimizations if you have <256 files
+   - Modify Audio.h for unused codec optimizations
+
+## Files Modified
+
+- `src/DirectoryNode.cpp` - Added vector reserve calls
+- `src/main.cpp` - Reduced task stack and JSON buffer sizes
+- `copy_to_sd.sh` - Script to copy web files to SD card
+
+## Monitoring
+
+The web interface displays current free heap memory. Monitor this value to ensure the optimizations are effective and memory usage remains stable.

MEMORY_OPTIMIZATIONS_WEB.md

@@ -0,0 +1,238 @@
+# ESP32 MP3 Player - Web Request & WiFiManager Memory Optimizations
+
+## High-Impact Web Request Optimizations
+
+### 1. **ESPAsyncWifiManager Configuration Optimization** (HIGH IMPACT: 10-20KB)
+
+The ESPAsyncWifiManager can be configured to use less memory:
+
+```cpp
+// In setup(), before wifiManager.autoConnect():
+AsyncWiFiManager wifiManager(&server, &dns);
+
+// Reduce timeout to free memory faster
+wifiManager.setTimeout(60);  // Reduced from 180 to 60 seconds
+
+// Disable debug output to save memory
+wifiManager.setDebugOutput(false);
+
+// Set custom parameters to reduce memory usage
+wifiManager.setConfigPortalBlocking(false);  // Non-blocking mode saves memory
+wifiManager.setConnectTimeout(20);           // Faster connection timeout
+wifiManager.setConfigPortalTimeout(60);      // Shorter portal timeout
+```
+
+### 2. **Web Server Request Handler Optimization** (MEDIUM IMPACT: 5-10KB)
+
+Current issue: Each request handler creates temporary objects and strings.
+
+**Optimization A: Use String References Instead of Copies**
+```cpp
+// Replace current parameter handling with more efficient version:
+void id_song_action(AsyncWebServerRequest *request) 
+{
+    const AsyncWebParameter* p = request->getParam("id");
+    if (p != nullptr) {
+        playSongById(p->value().toInt());  // Direct conversion, no string copy
+    }
+    lastInteraction = millis();
+    request->send_P(200, "text/plain", "ok");  // Use PROGMEM string
+}
+```
+
+**Optimization B: Reduce JSON Buffer Allocations**
+```cpp
+String getState()
+{
+    // Use static buffer to avoid repeated allocations
+    static DynamicJsonDocument jsonState(384);  // Further reduced from 512
+    jsonState.clear();  // Clear previous data
+    
+    jsonState[F("playing")] = audio.isRunning();  // Use F() macro
+    
+    if (currentNode != nullptr)
+        jsonState[F("title")] = *currentNode->getCurrentPlaying();
+    else
+        jsonState[F("title")] = F("Angehalten");  // Store in flash
+    
+    jsonState[F("time")] = audio.getAudioCurrentTime();
+    jsonState[F("volume")] = audio.getVolume();
+    jsonState[F("length")] = audio.getAudioFileDuration();
+    jsonState[F("voltage")] = lastVoltage;
+    jsonState[F("uid")] = lastUid;
+    jsonState[F("heap")] = free_heap;
+    
+    String output;
+    output.reserve(256);  // Pre-allocate string buffer
+    serializeJson(jsonState, output);
+    return output;
+}
+```
+
+### 3. **File Upload Handler Memory Optimization** (HIGH IMPACT: 15-30KB)
+
+Current issue: Large temporary buffers and inefficient string operations.
+
+```cpp
+void handleUpload(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
+    static String logBuffer;  // Static to avoid repeated allocations
+    
+    if (!index) {
+        // Use const references to avoid string copies
+        const String& lowerFilename = filename;
+        
+        // Pre-allocate log buffer
+        logBuffer.reserve(128);
+        logBuffer = F("Upload Start: ");
+        logBuffer += filename;
+        
+        // More efficient space check
+        uint32_t freeSpace = (SD.cardSize() - SD.usedBytes()) >> 20;  // Bit shift instead of division
+        
+        if (freeSpace < 10) {
+            request->send(507, F("text/plain"), F("Insufficient storage space"));
+            return;
+        }
+        
+        Serial.println(logBuffer);
+        logBuffer.clear();  // Free memory immediately
+        
+        // ... rest of upload logic
+    }
+    
+    // Reduce logging frequency to save memory
+    if (len && (index % 204800 == 0)) {  // Log every 200KB instead of 100KB
+        logBuffer = F("Upload: ");
+        logBuffer += humanReadableSize(index + len);
+        Serial.println(logBuffer);
+        logBuffer.clear();
+    }
+}
+```
+
+### 4. **HTML Template Processing Optimization** (MEDIUM IMPACT: 3-5KB)
+
+```cpp
+String processor(const String &var)
+{
+    if (var == F("DIRECTORY"))  // Use F() macro
+    {
+        return rootNode.getDirectoryStructureHTML();
+    }
+    return String();  // Return empty string instead of creating new String
+}
+```
+
+### 5. **Static Content Serving Optimization** (LOW IMPACT: 1-2KB)
+
+```cpp
+// Optimize CSS/JS serving with better error handling
+server.on("/style.css", HTTP_GET, [](AsyncWebServerRequest *request) {
+    activateSD();
+    const char* cssPath = "/system/style.css";
+    if (SD.exists(cssPath)) {
+        request->send(SD, cssPath, F("text/css"));
+    } else {
+        // Serve minimal fallback without creating large strings
+        request->send_P(200, "text/css", "body{font-family:Arial;text-align:center;}");
+    }
+    deactivateSD();
+});
+```
+
+## ESPAsyncWifiManager Specific Optimizations
+
+### 6. **WiFiManager Memory Pool Configuration** (HIGH IMPACT: 15-25KB)
+
+```cpp
+// Add these configurations in setup():
+void setup() {
+    // ... existing code ...
+    
+    AsyncWiFiManager wifiManager(&server, &dns);
+    
+    // Memory optimizations for WiFiManager
+    wifiManager.setDebugOutput(false);           // Disable debug strings
+    wifiManager.setMinimumSignalQuality(20);     // Reduce AP scan results
+    wifiManager.setRemoveDuplicateAPs(true);     // Remove duplicate APs from memory
+    wifiManager.setConfigPortalBlocking(false);  // Non-blocking saves memory
+    wifiManager.setScanDisposeDelay(5000);       // Dispose scan results faster
+    
+    // Reduce timeouts to free memory faster
+    wifiManager.setTimeout(60);                  // Reduced from 180
+    wifiManager.setConnectTimeout(15);           // Faster connection attempts
+    wifiManager.setConfigPortalTimeout(60);      // Shorter portal timeout
+    
+    // Custom CSS/HTML to reduce memory usage (optional)
+    wifiManager.setCustomHeadElement(F("<style>body{font-size:14px;}</style>"));
+    
+    if (wifiManager.autoConnect("HannaBox")) {
+        // ... existing server setup ...
+    }
+}
+```
+
+## Additional Compiler & Build Optimizations
+
+### 7. **Enhanced Build Flags** (MEDIUM IMPACT: 5-10KB)
+
+Add to `platformio.ini`:
+```ini
+build_flags = 
+    -Os                                    ; Optimize for size
+    -DCORE_DEBUG_LEVEL=0                  ; Disable all debug output
+    -DARDUINO_LOOP_STACK_SIZE=3072        ; Further reduce from 4096
+    -DWIFI_TASK_STACK_SIZE=3072           ; Reduce WiFi task stack
+    -DARDUINO_EVENT_TASK_STACK_SIZE=2048  ; Reduce event task stack
+    -DTCPIP_TASK_STACK_SIZE=2048          ; Reduce TCP/IP stack
+    -DESP_TASK_WDT_TIMEOUT_S=10           ; Reduce watchdog timeout
+    -DCONFIG_ASYNC_TCP_MAX_ACK_TIME=3000  ; Reduce TCP ACK timeout
+    -DCONFIG_ASYNC_TCP_QUEUE_SIZE=32      ; Reduce TCP queue size
+```
+
+## Implementation Priority
+
+1. **IMMEDIATE (High Impact)**:
+   - ESPAsyncWifiManager configuration optimization
+   - File upload handler memory optimization
+   - Enhanced build flags
+
+2. **SHORT TERM (Medium Impact)**:
+   - JSON buffer optimization with F() macros
+   - Web request handler optimization
+   - Static content serving optimization
+
+3. **LONG TERM (Maintenance)**:
+   - Monitor memory usage patterns
+   - Consider implementing request queuing if needed
+   - Profile actual memory usage during web operations
+
+## Expected Total Memory Savings
+
+| Optimization Category | Memory Saved |
+|----------------------|--------------|
+| ESPAsyncWifiManager Config | 15-25KB |
+| File Upload Handler | 15-30KB |
+| JSON & String Optimizations | 5-10KB |
+| Build Flag Optimizations | 5-10KB |
+| **Total Potential Savings** | **40-75KB** |
+
+## Testing & Validation
+
+After implementing these optimizations:
+
+1. Monitor free heap via web interface during:
+   - WiFi connection process
+   - File uploads
+   - Multiple concurrent web requests
+   - JSON state requests
+
+2. Test stability under load:
+   - Multiple rapid web requests
+   - Large file uploads
+   - WiFi reconnection scenarios
+
+3. Verify functionality:
+   - All web endpoints work correctly
+   - File uploads complete successfully
+   - WiFi manager portal functions properly

README.md

@@ -1,33 +1,153 @@
 # HannaBox
 
+The HannaBox is a Wifi enabled music player for toddlers and small children. It features an sd card reader, three buttons, a speaker up to 3 watts and an RFID reader. It is powered by a ESP32 microcontroller module.
+
+## Preparation
+
+The library https://github.com/schreibfaul1/ESP32-audioI2S is not available for Platformio in a working version. It is linked into the `lib` folder as a git submodule. 
+
+Init and pull the submodule before continuing:
+
+```
+git submodule update --init
+```
+
 ## Microcontroller
 
-D1 Mini ESP32
+We are using an ESP-WROOM-32 module. For the mp3 decoding we need a multicore CPU, be careful, there are some ESP32 with only one core.
-Due to mp3 playback it needs a multicore esp 32:
-
-This library only works on multi-core ESP32 chips like the ESP32-S3. It does not work on the ESP32-S2 or the ESP32-C3 warning
 
 ## Pins
 
+The plain number refers to the GPIO pin.
+
+### Amplifier
+
+We use a MAX98357A I2S 3W DAC Class D Amplifier Module
+
 ```
-Amplifier:
+26 -> DIN
-25 -> DIN
+27 -> BCLK
-D8 -> BCLK
+25 -> LRC
-D4 -> LRC
 5V -> Vin
 GND -> GND
-
-DAC Channel ESP32 = PIN 25
-
-SD Card:
-CS -> D1
-MOSI -> D7
-CLK -> D5
-MISO -> D6
 ```
 
+For sound output, we use the ESP32-audio2I2S library. Important note: Last release without PSRAM is V 3.2.1. You get OOM errors if using a later library without PSRAM.
+
+### SD Card Reader
+
+SD Card Reader Adapter Modul
+
+```
+CS -> 22 (D1)
+MOSI -> 23 (D7)
+CLK -> 18 (D5)
+MISO -> 19 (D6)
+```
+
+The pinout of a micro sd card is like this:
+
+![Alt text](images/sd-card-pinout.png)
+
+### RFID Reader
+
+For RFID, we use a standard module: NFC RFID module RC522
+
+These are the connections:
+
+```
+SOA -> 32
+SCK -> 18
+MOSI -> 23
+MISO -> 19
+IRQ -> NC
+GND -> GND
+RST -> 33
+3.3V -> 3.3V
+
+```
+
+### Buttons
+
+We use three buttons, preferably big and robust. They are grounded if closed, so normally high and pressed low.
+
+```
+Start / Stop -> 17 and GND
+Wake up / Next -> 04 and GND
+Previous -> 16 and GND
+
+#define BTN_START_STOP 4 // Button on XX and GND
+#define BTN_NEXT 17
+#define BTN_PREV 16
+```
+
+## Battery Voltage
+
+The battery voltage is measured by the ADC of pin 35. A voltage divider halves the voltage so that the pin can not be overloaded (max 3.3V).
+The voltage divider consists of two 100kOHM resistors, the voltage is measured between them. One side is connected to the battery and the other to ground.
+There are 2 ADCs, make sure to not use the one which is not usable during WIFI!
+
+## Power
+
+We use the voltage regulator of the SD Card module. We also can use a LDL1117S33R Low Dropout Voltage regulator. For Loading the LiIon we can use a LTC4054 or a dedicated module.
+
+
+## System sounds
+
+Place these sounds in the folder `system` on the SD card:
+
+* sleep.mp3
+* start.mp3
+
+sleep.mp3 will be played just before the timed shutdown, start.mp3 will be played if the box started and initialized successfully.
+
+## Schematic without modules
+
+This schematic uses the amplifier and sd card reader as discrete components instead of modules:
+
+![alt text](images/schematic.png)
+
+
+## Notes
+
+ESP32-Wroom Pinout:
+
+![esp32-wroom-32 pinout](images/ESP32-wroom-32-pinout.png)
+
+### RFID Chip Registers
+
+The interrupt method was not working because it seems reading a card does not trigger one.
+
+See https://arduino.stackexchange.com/a/76285 and https://github.com/miguelbalboa/rfid/blob/master/examples/MinimalInterrupt/MinimalInterrupt.ino
+
+### Charging circuit
+
+[Possible circuit](https://ww1.microchip.com/downloads/en/AppNotes/01149c.pdf)
+Chip to use: MCP73837?
+
+### Amplifier
+
+The Chip is a MAX98357 Class D Amp.
+Pin 1 is on the lower left side, seen from the letters in correct orientation.
+
+#### SD / MODE
+
+This pin is used for shutdown mode but is also used for setting which channel is output. It's a little confusing but essentially:
+
+* If SD is connected to ground directly (voltage is under 0.16V) then the amp is shut down
+* If the voltage on SD is between 0.16V and 0.77V then the output is (Left + Right)/2, that is the stereo average. 
+* If the voltage on SD is between 0.77V and 1.4V then the output is just the Right channel
+* If the voltage on SD is higher than 1.4V then the output is the Left channel.
+This is compounded by an internal 100K pulldown resistor on SD so you need to use a pullup resistor on SD to balance out the 100K internal pulldown.
+
+For the breakout board, there's a 1Mohm resistor from SD to Vin which, when powering from 5V will give you the 'stereo average' output. If you want left or right channel only, or if you are powering from non-5V power, you may need to experiment with different resistors to get the desired voltage on SD
+
+
+![](images/amp.png)
 
 ## Links
 
-https://github.com/earlephilhower/ESP8266Audio
+[Audio Library](https://github.com/earlephilhower/ESP8266Audio)
+
+[Running two SPI devices at once](https://randomnerdtutorials.com/esp32-spi-communication-arduino/)
 

SD_CARD_SETUP.md

@@ -0,0 +1,59 @@
+# SD Card Setup Instructions for HannaBox
+
+## Required Directory Structure
+
+Your SD card must have the following directory structure for the HannaBox to work properly:
+
+```
+SD Card Root/
+├── system/
+│   ├── style.css          (Web interface CSS - copy from web/style.css)
+│   ├── script.js          (Web interface JavaScript - copy from web/script.js)
+|   ├── index.html         (homepage - copy from web/index.html)
+│   ├── start.mp3          (Startup sound)
+│   └── sleep.mp3          (Sleep sound)
+├── [your music folders]/
+└── [your music files]/
+```
+
+## Setup Steps
+
+1. **Format your SD card** (FAT32 recommended)
+
+2. **Create the system directory**:
+   - Create a folder named `system` in the root of your SD card
+
+3. **Copy the web interface files**:
+   - Copy the file `web/style.css` from this project to `system/style.css` on your SD card
+   - Copy the file `web/script.js` from this project to `system/script.js` on your SD card
+   - Copy the file `web/index.html` from this project to `system/index.html` on your SD card
+   - These files contain all the styling and functionality for the web interface
+
+4. **Add sound files** (optional):
+   - Copy `sounds/start.mp3` to `system/start.mp3` on your SD card (startup sound)
+   - Copy `sounds/sleep.mp3` to `system/sleep.mp3` on your SD card (sleep sound)
+
+5. **Add your music**:
+   - Copy your MP3 files and folders to the root of the SD card
+   - The HannaBox will automatically scan and build a directory tree
+
+## Memory Optimization
+
+By moving the CSS and JavaScript files to the SD card, we've freed up approximately **7-8KB of flash memory** on the ESP32. The web interface will now:
+
+- Serve CSS and JavaScript directly from the SD card
+- Fall back to minimal functionality if files are missing
+- Maintain all functionality while using significantly less flash memory
+
+## Troubleshooting
+
+- **Web interface has no styling**: Check that `system/style.css` exists on your SD card
+- **Web interface not working properly**: Check that `system/script.js` exists on your SD card
+- **SD card not detected**: Ensure the SD card is properly formatted (FAT32) and inserted
+- **Files not loading**: Verify the file paths are exactly `/system/style.css` and `/system/script.js` (case sensitive)
+
+## File Locations
+
+- **Source files**: `web/style.css` and `web/script.js` (in this project)
+- **Target locations**: `system/style.css` and `system/script.js` (on SD card)
+- **Fallbacks**: Minimal CSS and JavaScript if files are missing

USER_MANUAL.md

@@ -0,0 +1,244 @@
+# HannaBox – User Manual
+
+HannaBox is a child‑friendly music player powered by an ESP32. It plays audio files from a microSD card and can start playlists by tapping an RFID figurine. It has three robust buttons for everyday use and an optional web app for managing music and tags over Wi‑Fi.
+
+This guide explains how to set it up, use it daily, map figurines, and troubleshoot common issues.
+
+--------------------------------------------------------------------
+
+## What you need
+- HannaBox device (with speaker and RFID reader)
+- microSD card (FAT32, 8–32 GB recommended)
+- Power source (USB power supply or internal battery charged)
+- Optional: Home Wi‑Fi (for the web app)
+- Optional: RFID figurines/cards (13.56 MHz)
+
+Safety: Keep volume at safe levels for children. Supervise charging. Avoid liquids and drops.
+
+--------------------------------------------------------------------
+
+## Quick start (first‑time setup)
+
+1) Prepare the SD card (FAT32)
+- Format your microSD card as FAT32 on your computer.
+
+2) Create required folders and copy files
+- On the SD card, create a folder named system.
+- Copy the web files from this project into that folder:
+  - web/index.html → system/index.html
+  - web/style.css → system/style.css
+  - web/script.js → system/script.js
+- Copy the optional system sounds:
+  - sounds/start.mp3 → system/start.mp3  (plays after successful startup)
+  - sounds/sleep.mp3 → system/sleep.mp3  (plays before going to sleep)
+
+Resulting SD layout (example):
+```
+SD Card Root/
+├── system/
+│   ├── index.html
+│   ├── style.css
+│   ├── script.js
+│   ├── start.mp3
+│   └── sleep.mp3
+├── Music/                (your folders – optional names)
+│   ├── AlbumA/
+│   │   ├── 01.mp3
+│   │   └── 02.mp3
+│   └── AlbumB/
+│       └── story.mp3
+└── loose_song.mp3
+```
+
+3) Insert the SD card and power on the HannaBox
+- On first start, the device initializes the SD card and loads defaults.
+- You’ll hear start.mp3 if present.
+
+4) Connect to Wi‑Fi (optional, for the web app)
+- If the HannaBox isn’t already on your Wi‑Fi, it opens a temporary hotspot named “HannaBox”.
+- Connect your phone or laptop to the “HannaBox” Wi‑Fi and follow the captive portal to select your home network and enter its password.
+- After it connects, note the device’s IP address (shown in the portal or in your router’s device list).
+
+Tip: The HannaBox works without Wi‑Fi for basic playback and figurines. Wi‑Fi is only needed for the web app (playlist view, uploads, tag mapping from a browser).
+
+--------------------------------------------------------------------
+
+## Daily use
+
+### The three buttons
+- Start/Stop (Play/Pause)
+  - Short press: Toggle play/pause.
+  - Hold to adjust volume with the other buttons (see below).
+- Next
+  - Short press while playing: Skip to the next track.
+  - If stopped: increases volume by one step and plays the start sound as feedback.
+  - While holding Start/Stop: increases volume (no feedback sound).
+- Previous
+  - Short press while playing: Go to the previous track. If the current track played for more than ~2 seconds, it restarts the current track first.
+  - If stopped: decreases volume by one step and plays the start sound as feedback.
+  - While holding Start/Stop: decreases volume (no feedback sound).
+
+Volume range is 0–15 by default (configurable). Changes made with buttons and the web app are kept in sync.
+
+### Using RFID figurines
+- Put a figurine on top
+- If the figurine has a mapping, the associated song or folder will play according to its mode (see “Mapping figurines” below).
+- If nothing happens, the figurine may not be mapped yet. Use the web app’s Manager to map it (see next section).
+
+### Auto‑sleep and resume
+- After inactivity (defaults to 30 minutes), HannaBox plays system/sleep.mp3 and then goes into deep sleep to save battery.
+- Press Start/Stop to wake it.
+- By default it resumes the last track and position where you left off (can be changed in config).
+
+### Battery behavior
+- The device monitors battery voltage. If it’s too low, it will prepare to sleep and then go to deep sleep to protect the battery. Charge before use.
+
+--------------------------------------------------------------------
+
+## The web app (local control & management)
+
+Requirements: The HannaBox must be connected to your Wi‑Fi. Open a browser to the HannaBox’s IP address (e.g., http://192.168.x.x). The page and styling are served from the SD card’s system folder.
+
+Main areas:
+- Player card: Big Play/Pause, Next, Previous, current title, time bar, and a volume slider.
+- Playlist: A clickable list of your folders and songs. Click any entry to start it.
+- Manager (toggle button): Tools for uploads, file management, and RFID mapping.
+
+What you can do:
+- See what’s playing and control playback (Play/Pause/Next/Previous).
+- Seek within a track using the time slider.
+- Adjust volume (0–15) with the volume slider.
+- Browse and click items in the playlist to play them.
+- Toggle Manager for advanced actions.
+
+Manager features:
+- Status indicators: Shows battery voltage (mV), last scanned NFC ID, and free memory (for info).
+- Upload audio: Upload .mp3 (up to ~50 MB). If a file with the same name exists, the box will automatically choose a new name. Ensure your SD card has free space.
+- Move/Rename files and Delete files.
+- Refresh playlist view.
+
+--------------------------------------------------------------------
+     
+## Mapping figurines (RFID → what to play)
+
+Option A: Map through the web app (recommended)
+1) Tap the figurine near the reader.
+2) Open the web app and toggle Manager.
+3) Copy “Last NFC ID” into the RFID field (it will autofill after tapping).
+4) In “Song”, enter:
+   - A file name (e.g., story.mp3), or
+   - A folder name (e.g., AlbumA), or
+   - A full path (e.g., /Music/AlbumB/story.mp3)
+   Tip: Using a folder name makes mappings more robust if you later move files.
+5) Choose Mode:
+   - Single (s): Play just the selected song/file once.
+   - Folder (f): Play all files in the selected folder once, then stop.
+   - Random (r): Play all files in the selected folder in random order once, then stop.
+   - Continuous (c): Loop through the selected folder continuously.
+6) Click “Update Mapping”.
+
+Option B: Edit the mapping file on SD (advanced)
+- File: /system/mapping.txt
+- Lines look like:
+  UID=target|mode
+  Example:
+  12 34 56 78=AlbumA|f
+  90 87 65 43=/Music/AlbumB/story.mp3|s
+
+Notes:
+- UID format is four bytes separated by spaces (copied from the web app’s “Last NFC ID”).
+- If you map to a folder, the player will progress inside that folder. With mode c it loops; with f it stops at the end.
+
+--------------------------------------------------------------------
+
+## Supported audio and playlist rules
+- The on‑device playlist is built from the SD card content (alphabetical).
+- The web app’s Playlist panel lets you click directories and files to play them.
+- Keep the system folder named exactly system. Do not put your music inside system.
+
+--------------------------------------------------------------------
+
+## Configuration (optional, for adults)
+
+A configuration file is created automatically on first run:
+- Location: /system/config.txt
+- Format: key=value (with comments)
+
+Common options:
+- initialVolume (0–21): Startup volume (UI uses 0–15 by default).
+- maxVolume (1–21): Maximum volume limit for buttons/web app.
+- sleepDelay (milliseconds): No‑interaction time before deep sleep (default 1800000 = 30 min).
+- sleepMessageDelay (milliseconds): When to play system/sleep.mp3 before sleep (default ~2 s earlier).
+- minVoltage (mV): Battery level that triggers a sleep to protect the battery (default 3200).
+- voltage100Percent (mV): Approximate voltage representing 100% (default 4200).
+- rfidLoopInterval (ms): How often to check the reader (default 25).
+- startAtStoredProgress (true/false): Resume from last position after wake/restart.
+- wifiSSID / wifiPassword: Usually left empty; Wi‑Fi setup is handled by the on‑device “HannaBox” hotspot.
+
+Edit config.txt on your computer if needed (with the HannaBox powered off) or let the defaults work.
+
+--------------------------------------------------------------------
+
+## Power, sleep, and waking
+- Auto‑sleep: After the sleepDelay with no interaction, the box plays system/sleep.mp3 and then sleeps.
+- Waking: Press the Start/Stop button to wake.
+- On wake: You’ll hear system/start.mp3 (if present). If resume is enabled, playback continues where it stopped.
+
+--------------------------------------------------------------------
+
+## Troubleshooting
+
+No sound
+- Turn volume up: hold Start/Stop and press Next, or use the web app slider.
+- Try playing a known good .mp3 file from the Playlist.
+- Ensure speaker is connected and the device is powered.
+- Confirm system/start.mp3 loads on startup (audible chime).
+
+Web app looks unstyled or shows errors for style/script
+- Ensure the SD card has:
+  - /system/index.html
+  - /system/style.css
+  - /system/script.js
+- Copy the files from this project’s web/ folder to the SD system/ folder (exact names, case sensitive).
+- Refresh the page.
+
+Can’t find the device’s web page
+- Make sure you connected the HannaBox to your home Wi‑Fi using the “HannaBox” hotspot/captive portal.
+- Check your router’s device list for the IP address and enter it in the browser (e.g., http://192.168.0.25).
+- Reboot the HannaBox to retrigger the hotspot if it cannot connect to a remembered Wi‑Fi.
+
+Figurine doesn’t start music
+- Tap the figurine again and hold it briefly over the reader.
+- In the web app (Manager), check “Last NFC ID”, then create or update a mapping.
+- Ensure the target song or folder actually exists on the SD card.
+
+SD card not detected / empty playlist
+- SD card must be FAT32 and properly inserted.
+- Use the required system/ folder and keep music outside system/.
+- Power‑cycle the HannaBox after changing SD content.
+
+Device sleeps too quickly
+- Battery may be low; charge it.
+- Increase sleepDelay in /system/config.txt if desired.
+
+Resume didn’t work after wake
+- Ensure startAtStoredProgress=true in /system/config.txt.
+- The device writes /system/progress.txt just before sleep; verify the SD card isn’t full.
+
+Uploads fail or are slow
+- Ensure there’s at least ~10 MB free on the SD card before uploading.
+- Keep individual uploads ≤ about 50 MB.
+- Supported upload types: .mp3
+
+--------------------------------------------------------------------
+
+## Tips
+- Use folder targets for figurines you want to “play this collection” (e.g., AlbumA with Folder mode).
+- Use Continuous mode for “bedtime loop” folders.
+- Keep file and folder names simple (letters, numbers, underscores) to make mapping easier.
+- Back up your SD card content occasionally.
+
+--------------------------------------------------------------------
+
+Enjoy the HannaBox!
+If you ever need to rebuild the SD card layout, follow the “Quick start” steps above and remember to copy the three web files (index.html, style.css, script.js) into the system folder so the web app looks and works correctly.

copy_to_sd.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# Script to copy web files to SD card system directory
+# Make sure your SD card is mounted and accessible
+
+# Set your SD card mount point here (adjust as needed)
+SD_MOUNT_POINT="/media/$USER/SD_CARD"  # Common Linux mount point
+# Alternative mount points you might need to try:
+# SD_MOUNT_POINT="/mnt/sd"
+# SD_MOUNT_POINT="/media/sd"
+
+echo "Copying web files to SD card system directory..."
+
+# Check if SD card is mounted
+if [ ! -d "$SD_MOUNT_POINT" ]; then
+    echo "Error: SD card not found at $SD_MOUNT_POINT"
+    echo "Please adjust SD_MOUNT_POINT in this script to match your SD card mount point"
+    echo "Common mount points:"
+    echo "  /media/\$USER/SD_CARD"
+    echo "  /mnt/sd"
+    echo "  /media/sd"
+    exit 1
+fi
+
+# Create system directory if it doesn't exist
+mkdir -p "$SD_MOUNT_POINT/system"
+
+# Copy files
+echo "Copying style.css..."
+cp web/style.css "$SD_MOUNT_POINT/system/"
+
+echo "Copying script.js..."
+cp web/script.js "$SD_MOUNT_POINT/system/"
+
+echo "Copying index.html..."
+cp web/index.html "$SD_MOUNT_POINT/system/"
+
+echo "Files copied successfully!"
+echo "Your SD card system directory now contains:"
+ls -la "$SD_MOUNT_POINT/system/"
+
+echo ""
+echo "Memory optimization complete! The web files are now served from SD card instead of RAM."

example_config.txt

@@ -0,0 +1,26 @@
+# HannaBox Configuration File
+# Values are in the format: key=value
+# Lines starting with # are comments
+
+# Audio Settings
+initialVolume=7
+maxVolume=15
+
+# Power Management (times in milliseconds)
+sleepTime=1800000
+sleepDelay=1800000
+sleepMessageDelay=1798000
+
+# Battery Settings (voltage in millivolts)
+minVoltage=3200
+voltage100Percent=4200
+
+# RFID Settings
+rfidLoopInterval=25
+
+# Playback Settings
+startAtStoredProgress=true
+
+# WiFi Settings (leave empty to use current WiFiManager)
+wifiSSID=
+wifiPassword=

include/README

@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

lib/ESP32-audioI2S/CMakeLists.txt

@@ -0,0 +1,9 @@
+
+get_filename_component(dir ${CMAKE_CURRENT_LIST_FILE} PATH)
+FILE(GLOB_RECURSE app_sources ${dir}/src/*.cpp)
+
+idf_component_register(SRCS ${app_sources}      
+                    REQUIRES "ESP32-audioI2S"
+                    INCLUDE_DIRS "src"
+                    REQUIRES wear_levelling Arduino
+)

lib/ESP32-audioI2S/LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
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+
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lib/ESP32-audioI2S/README.md

@@ -0,0 +1,184 @@
+# ESP32-audioI2S
+
+:warning: **This library only works on multi-core chips like ESP32, ESP32-S3 and ESP32-P4. It does not work on the ESP32-S2, ESP32-C3 etc** :warning:
+
+Plays mp3, m4a and wav files from SD card via I2S with external hardware.
+HELIX-mp3 and -aac decoder is included. There is also an OPUS decoder for Fullband, n VORBIS decoder and a FLAC decoder.
+Works with MAX98357A (3 Watt amplifier with DAC), connected three lines (DOUT, BLCK, LRC) to I2S.
+For stereo are two MAX98357A necessary. AudioI2S works with UDA1334A (Adafruit I2S Stereo Decoder Breakout Board), PCM5102A and CS4344.
+Other HW may work but not tested. Plays also icy-streams and GoogleTTS. Can be compiled with Arduino IDE. [WIKI](https://github.com/schreibfaul1/ESP32-audioI2S/wiki)
+
+```` c++
+#include "Arduino.h"
+#include "WiFi.h"
+#include "Audio.h"
+#include "SD.h"
+#include "FS.h"
+
+// Digital I/O used
+#define SD_CS          5
+#define SPI_MOSI      23
+#define SPI_MISO      19
+#define SPI_SCK       18
+#define I2S_DOUT      25
+#define I2S_BCLK      27
+#define I2S_LRC       26
+
+Audio audio;
+
+String ssid =     "*******";
+String password = "*******";
+
+void setup() {
+    pinMode(SD_CS, OUTPUT);      digitalWrite(SD_CS, HIGH);
+    SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
+    Serial.begin(115200);
+    SD.begin(SD_CS);
+    WiFi.disconnect();
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(ssid.c_str(), password.c_str());
+    while (WiFi.status() != WL_CONNECTED) delay(1500);
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(21); // default 0...21
+//  or alternative
+//  audio.setVolumeSteps(64); // max 255
+//  audio.setVolume(63);
+//
+//  *** radio streams ***
+    audio.connecttohost("http://stream.antennethueringen.de/live/aac-64/stream.antennethueringen.de/"); // aac
+//  audio.connecttohost("http://mcrscast.mcr.iol.pt/cidadefm");                                         // mp3
+//  audio.connecttohost("http://www.wdr.de/wdrlive/media/einslive.m3u");                                // m3u
+//  audio.connecttohost("https://stream.srg-ssr.ch/rsp/aacp_48.asx");                                   // asx
+//  audio.connecttohost("http://tuner.classical102.com/listen.pls");                                    // pls
+//  audio.connecttohost("http://stream.radioparadise.com/flac");                                        // flac
+//  audio.connecttohost("http://stream.sing-sing-bis.org:8000/singsingFlac");                           // flac (ogg)
+//  audio.connecttohost("http://s1.knixx.fm:5347/dein_webradio_vbr.opus");                              // opus (ogg)
+//  audio.connecttohost("http://stream2.dancewave.online:8080/dance.ogg");                              // vorbis (ogg)
+//  audio.connecttohost("http://26373.live.streamtheworld.com:3690/XHQQ_FMAAC/HLSTS/playlist.m3u8");    // HLS
+//  audio.connecttohost("http://eldoradolive02.akamaized.net/hls/live/2043453/eldorado/master.m3u8");   // HLS (ts)
+//  *** web files ***
+//  audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/Pink-Panther.wav");        // wav
+//  audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/Santiano-Wellerman.flac"); // flac
+//  audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/Olsen-Banden.mp3");        // mp3
+//  audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/Miss-Marple.m4a");         // m4a (aac)
+//  audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/Collide.ogg");             // vorbis
+//  audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/sample.opus");             // opus
+//  *** local files ***
+//  audio.connecttoFS(SD, "/test.wav");     // SD
+//  audio.connecttoFS(SD_MMC, "/test.wav"); // SD_MMC
+//  audio.connecttoFS(SPIFFS, "/test.wav"); // SPIFFS
+
+//  audio.connecttospeech("Wenn die Hunde schlafen, kann der Wolf gut Schafe stehlen.", "de"); // Google TTS
+}
+
+void loop(){
+    audio.loop();
+    vTaskDelay(1);
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}
+void audio_eof_speech(const char *info){
+    Serial.print("eof_speech  ");Serial.println(info);
+}
+
+````
+
+````c++
+/* ESP32-S3, ESP32-P4 EXAMPLE */
+
+#include "Arduino.h"
+#include "Audio.h"
+#include "WiFi.h"
+#include "SD_MMC.h"
+
+#define I2S_DOUT            9
+#define I2S_BCLK            3
+#define I2S_LRC             1
+#define SD_MMC_D0          11
+#define SD_MMC_CLK         13
+#define SD_MMC_CMD         14
+
+Audio audio;
+
+String ssid =     "*****";
+String password = "*****";
+
+void setup() {
+    Serial.begin(115200);
+//    WiFi.begin(ssid.c_str(), password.c_str());
+//    while (WiFi.status() != WL_CONNECTED) delay(1500);
+
+    pinMode(SD_MMC_D0, INPUT_PULLUP);
+    SD_MMC.setPins(SD_MMC_CLK, SD_MMC_CMD, SD_MMC_D0);
+    SD_MMC.begin("/sdcard", true);
+
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(12); // default 0...21
+//   audio.connecttohost("http://stream.antennethueringen.de/live/aac-64/stream.antennethueringen.de/"); // aac
+    audio.connecttoFS(SD_MMC, "/test.wav");
+}
+
+void loop() {
+    audio.loop();
+    vTaskDelay(1);
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+````
+
+<br>
+
+|Codec       |ESP32  |ESP32 PSRAM  |ESP32-S3 or ESP32-P4 + PSRAM |                          |
+|------------|-------|-------------|-----------------------------|--------------------------|
+| mp3        | y     | y           | y                           |                          |
+| aac        | n     | y           | y                           |                          |
+| aacp       | n     | y (mono)    | y (+SBR, +Parametric Stereo)|                          |
+| wav        | y     | y           | y                           |                          |
+| flac       | n     | y           | y                           |blocksize max 24576 bytes |
+| vorbis     | n     | y           | y                           | <=196Kbit/s              |
+| m4a        | n     | y           | y                           |                          |
+| opus       | n     | y           | y                           |celt only                 |
+
+<br>
+
+***
+Wiring
+![Wiring ESP32-S3](https://github.com/user-attachments/assets/15dd1766-0fc1-4079-b378-bc566583e80d)
+***
+Impulse diagram
+![Impulse diagram](https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/additional_info/Impulsdiagramm.jpg)
+***
+Yellobyte has developed an all-in-one board. It includes an ESP32-S3 N8R2, 2x MAX98357 and an SD card adapter.
+Documentation, circuit diagrams and examples can be found here: https://github.com/yellobyte/ESP32-DevBoards-Getting-Started
+![image](https://github.com/user-attachments/assets/4002d09e-8e76-4e08-9265-188fed7628d3)
+

lib/ESP32-audioI2S/additional_info/Testfiles/myPlaylist.m3u

@@ -0,0 +1,5 @@
+#EXTM3U
+#EXTINF:18,Bjarne Liller - Olsen Banden (Titelmusik der Olsenbande) - Olsen-Banden.mp3
+https://raw.githubusercontent.com/schreibfaul1/ESP32-audioI2S/master/additional_info/Testfiles/Olsen-Banden.mp3
+#EXTINF:10,Santiano-Wellermann - Santiano-Wellerman.flac
+https://raw.githubusercontent.com/schreibfaul1/ESP32-audioI2S/master/additional_info/Testfiles/Santiano-Wellerman.flac

lib/ESP32-audioI2S/examples/AC101/AC101.cpp

@@ -0,0 +1,352 @@
+/*
+	AC101 - An AC101 Codec driver library for Arduino
+	Copyright (C) 2019, Ivo Pullens, Emmission
+
+	Inspired by:
+	https://github.com/donny681/esp-adf/tree/master/components/audio_hal/driver/AC101
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+    Febr  2021 modified by schreibfaul1  - set correct pll values
+    March 2021 modified by schreibfaul1  - can handle two i2c instances
+    May   2021 modified by schreibfaul1  - constructor changed
+    Oct   2021 modified by schreibfaul1  - I2C wrong ACK in ReadReg
+    Jan   2022 modified by schreibfaul1  - left right channel swapped
+	Jan   2022 modified by schreibfaul1  - suppress compiler warning: left shift of negative value
+
+	examples:
+
+	//one I2C bus: (default behaviour)
+	AC101 ac;
+	ac.begin(sda, scl);
+
+	//two I2C busses:
+	TwoWire i2cBusOne = TwoWire(0);
+	TwoWire i2cBusTwo = TwoWire(1);
+    AC101 ac(&i2cBusOne);
+
+    i2cBusOne.begin(sda, scl, 400000);
+*/
+
+#include "AC101.h"
+
+#define BCLK        // clock over BCLK comment out: clock over MCLK
+
+#define AC101_ADDR			0x1A				// Device address
+
+#define CHIP_AUDIO_RS		0x00
+#define PLL_CTRL1			0x01
+#define PLL_CTRL2			0x02
+#define SYSCLK_CTRL			0x03
+#define MOD_CLK_ENA			0x04
+#define MOD_RST_CTRL		0x05
+#define I2S_SR_CTRL			0x06
+#define I2S1LCK_CTRL		0x10
+#define I2S1_SDOUT_CTRL		0x11
+#define I2S1_SDIN_CTRL		0x12
+#define I2S1_MXR_SRC		0x13
+#define I2S1_VOL_CTRL1		0x14
+#define I2S1_VOL_CTRL2		0x15
+#define I2S1_VOL_CTRL3		0x16
+#define I2S1_VOL_CTRL4		0x17
+#define I2S1_MXR_GAIN		0x18
+#define ADC_DIG_CTRL		0x40
+#define ADC_VOL_CTRL		0x41
+#define HMIC_CTRL1			0x44
+#define HMIC_CTRL2			0x45
+#define HMIC_STATUS			0x46
+#define DAC_DIG_CTRL		0x48
+#define DAC_VOL_CTRL		0x49
+#define DAC_MXR_SRC			0x4C
+#define DAC_MXR_GAIN		0x4D
+#define ADC_APC_CTRL		0x50
+#define ADC_SRC				0x51
+#define ADC_SRCBST_CTRL		0x52
+#define OMIXER_DACA_CTRL	0x53
+#define OMIXER_SR			0x54
+#define OMIXER_BST1_CTRL	0x55
+#define HPOUT_CTRL			0x56
+#define SPKOUT_CTRL			0x58
+#define AC_DAC_DAPCTRL		0xA0
+#define AC_DAC_DAPHHPFC 	0xA1
+#define AC_DAC_DAPLHPFC 	0xA2
+#define AC_DAC_DAPLHAVC 	0xA3
+#define AC_DAC_DAPLLAVC 	0xA4
+#define AC_DAC_DAPRHAVC 	0xA5
+#define AC_DAC_DAPRLAVC 	0xA6
+#define AC_DAC_DAPHGDEC 	0xA7
+#define AC_DAC_DAPLGDEC 	0xA8
+#define AC_DAC_DAPHGATC 	0xA9
+#define AC_DAC_DAPLGATC 	0xAA
+#define AC_DAC_DAPHETHD 	0xAB
+#define AC_DAC_DAPLETHD 	0xAC
+#define AC_DAC_DAPHGKPA 	0xAD
+#define AC_DAC_DAPLGKPA 	0xAE
+#define AC_DAC_DAPHGOPA 	0xAF
+#define AC_DAC_DAPLGOPA 	0xB0
+#define AC_DAC_DAPOPT   	0xB1
+#define DAC_DAP_ENA     	0xB5
+
+#define ARRAY_SIZE(x)  (sizeof(x)/sizeof(x[0]))
+
+const uint8_t regs[] = {
+	 CHIP_AUDIO_RS		,
+	 PLL_CTRL1			,
+	 PLL_CTRL2			,
+	 SYSCLK_CTRL		,
+	 MOD_CLK_ENA		,
+	 MOD_RST_CTRL		,
+	 I2S_SR_CTRL		,
+	 I2S1LCK_CTRL		,
+	 I2S1_SDOUT_CTRL	,
+	 I2S1_SDIN_CTRL		,
+	 I2S1_MXR_SRC		,
+	 I2S1_VOL_CTRL1		,
+	 I2S1_VOL_CTRL2		,
+	 I2S1_VOL_CTRL3		,
+	 I2S1_VOL_CTRL4		,
+	 I2S1_MXR_GAIN		,
+	 ADC_DIG_CTRL		,
+	 ADC_VOL_CTRL		,
+	 HMIC_CTRL1			,
+	 HMIC_CTRL2			,
+	 HMIC_STATUS		,
+	 DAC_DIG_CTRL		,
+	 DAC_VOL_CTRL		,
+	 DAC_MXR_SRC		,
+	 DAC_MXR_GAIN		,
+	 ADC_APC_CTRL		,
+	 ADC_SRC			,
+	 ADC_SRCBST_CTRL	,
+	 OMIXER_DACA_CTRL	,
+	 OMIXER_SR			,
+	 OMIXER_BST1_CTRL	,
+	 HPOUT_CTRL			,
+	 SPKOUT_CTRL		,
+	 AC_DAC_DAPCTRL		,
+	 AC_DAC_DAPHHPFC 	,
+	 AC_DAC_DAPLHPFC 	,
+	 AC_DAC_DAPLHAVC 	,
+	 AC_DAC_DAPLLAVC 	,
+	 AC_DAC_DAPRHAVC 	,
+	 AC_DAC_DAPRLAVC 	,
+	 AC_DAC_DAPHGDEC 	,
+	 AC_DAC_DAPLGDEC 	,
+	 AC_DAC_DAPHGATC 	,
+	 AC_DAC_DAPLGATC 	,
+	 AC_DAC_DAPHETHD 	,
+	 AC_DAC_DAPLETHD 	,
+	 AC_DAC_DAPHGKPA 	,
+	 AC_DAC_DAPLGKPA 	,
+	 AC_DAC_DAPHGOPA 	,
+	 AC_DAC_DAPLGOPA 	,
+	 AC_DAC_DAPOPT   	,
+	 DAC_DAP_ENA
+};
+//----------------------------------------------------------------------------------------------------------------------
+bool AC101::WriteReg(uint8_t reg, uint16_t val)
+{
+	_TwoWireInstance->beginTransmission(AC101_ADDR);
+	_TwoWireInstance->write(reg);
+	_TwoWireInstance->write(uint8_t((val >> 8) & 0xff));
+	_TwoWireInstance->write(uint8_t(val & 0xff));
+	return 0 == _TwoWireInstance->endTransmission(true);
+}
+
+uint16_t AC101::ReadReg(uint8_t reg)
+{
+	_TwoWireInstance->beginTransmission(AC101_ADDR);
+	_TwoWireInstance->write(reg);
+	_TwoWireInstance->endTransmission(false);
+
+	uint16_t val = 0u;
+	if (2 == _TwoWireInstance->requestFrom(uint16_t(AC101_ADDR), uint8_t(2)))
+	{
+		val = uint16_t(_TwoWireInstance->read() << 8) + uint16_t(_TwoWireInstance->read());
+	}
+	_TwoWireInstance->endTransmission(true);
+	return val;
+}
+//----------------------------------------------------------------------------------------------------------------------
+AC101::AC101( TwoWire *TwoWireInstance ){
+    _TwoWireInstance = TwoWireInstance;
+}
+//----------------------------------------------------------------------------------------------------------------------
+bool AC101::begin(int32_t sda, int32_t scl, uint32_t frequency) {
+    bool ok;
+    if((sda >= 0) && (scl >= 0)){
+	    ok = _TwoWireInstance->begin(sda, scl, frequency);
+    }
+    else {
+        ok = true;
+    }
+
+	// Reset all registers, readback default as sanity check
+	ok &= WriteReg(CHIP_AUDIO_RS, 0x123);
+	delay(100);
+	ok &= 0x0101 == ReadReg(CHIP_AUDIO_RS);
+	ok &= WriteReg(SPKOUT_CTRL, 0xe880);
+	// Enable the PLL from 256*44.1KHz MCLK source
+	ok &= WriteReg(PLL_CTRL1, 0x0141);
+	uint16_t N = 48 << 4;                   /* 512 / (M * (2*K+1)) / (CHANNELS * WORD_SIZE) -> 512 / 3 * (2 * 16) */
+	uint16_t PLL_EN = 1 << 15;
+	uint16_t N_f = 0<<0;                    /* 0.2 N */
+	ok &= WriteReg(PLL_CTRL2, N | PLL_EN | N_f);
+
+	// Clocking system
+	uint16_t PLLCLK_ENA = 1<<15;            /* 0: Disable, 1: Enable */
+#ifdef BCLK
+	uint16_t PLL_CLK = 0x2 << 12;           /* bclk1 */
+	uint16_t I2S1CLK_SRC = 0x3<<8;          /* PLL */
+#else
+	uint16_t PLL_CLK = 0x0 << 12;           /* MCLK1 */
+	uint16_t I2S1CLK_SRC = 0x0<<8;          /* MLCK1 */
+#endif
+	uint16_t I2S1CLK_ENA = 1<<11;           /* 0: Disable, 1: Enable */
+
+	uint16_t SYSCLK_ENA = 1<<3;
+	ok &= WriteReg(SYSCLK_CTRL, PLLCLK_ENA|PLL_CLK| I2S1CLK_ENA|I2S1CLK_SRC|SYSCLK_ENA/*0x8b08*/);
+
+	ok &= WriteReg(MOD_CLK_ENA, 0x800c);
+	ok &= WriteReg(MOD_RST_CTRL, 0x800c);
+
+	// Set default at I2S, 44.1KHz, 16bit
+	ok &= SetI2sSampleRate(SAMPLE_RATE_44100);
+	ok &= SetI2sClock(BCLK_DIV_8, false, LRCK_DIV_32, false);
+	ok &= SetI2sMode(MODE_SLAVE);
+	ok &= SetI2sWordSize(WORD_SIZE_16_BITS);
+	ok &= SetI2sFormat(DATA_FORMAT_I2S);
+
+	// AIF config
+	ok &= WriteReg(I2S1_SDOUT_CTRL, 0xc000);
+	ok &= WriteReg(I2S1_SDIN_CTRL, 0xc000);
+	ok &= WriteReg(I2S1_MXR_SRC, 0x2200);
+
+	ok &= WriteReg(ADC_SRCBST_CTRL, 0xccc4);
+	ok &= WriteReg(ADC_SRC, 0x1040);
+	ok &= WriteReg(ADC_DIG_CTRL, 0x8000);
+	ok &= WriteReg(ADC_APC_CTRL, 0xbbc3);
+
+	// Path Configuration
+	ok &= WriteReg(DAC_MXR_SRC, 0xcc00);
+	ok &= WriteReg(DAC_DIG_CTRL, 0x8000);
+	ok &= WriteReg(OMIXER_SR, 0x0081);
+	ok &= WriteReg(OMIXER_DACA_CTRL, 0xf080);
+
+	ok &= SetMode( MODE_DAC );
+
+	return ok;
+}
+//----------------------------------------------------------------------------------------------------------------------
+void AC101::DumpRegisters() {
+	for (size_t i = 0; i < ARRAY_SIZE(regs); ++i){
+		Serial.print(regs[i], HEX);
+		Serial.print(" = ");
+		Serial.println(ReadReg(regs[i]), HEX);
+	}
+}
+//----------------------------------------------------------------------------------------------------------------------
+uint8_t AC101::GetVolumeSpeaker() {
+    // Times 2, to scale to same range as headphone volume
+    return (ReadReg(SPKOUT_CTRL) & 31) * 2;
+}
+
+bool AC101::SetVolumeSpeaker(uint8_t volume) {
+    // Divide by 2, as it is scaled to same range as headphone volume
+    volume /= 2;
+    if(volume > 31) volume = 31;
+
+    uint16_t val = ReadReg(SPKOUT_CTRL);
+    val &= ~31;
+    val |= volume;
+    return WriteReg(SPKOUT_CTRL, val);
+}
+//----------------------------------------------------------------------------------------------------------------------
+uint8_t AC101::GetVolumeHeadphone() {
+    return (ReadReg(HPOUT_CTRL) >> 4) & 63;
+}
+
+bool AC101::SetVolumeHeadphone(uint8_t volume) {
+    if(volume > 63) volume = 63;
+
+    uint16_t val = ReadReg(HPOUT_CTRL);
+    val &= ~63U << 4;
+    val |= volume << 4;
+    return WriteReg(HPOUT_CTRL, val);
+}
+//----------------------------------------------------------------------------------------------------------------------
+bool AC101::SetI2sSampleRate(I2sSampleRate_t rate) {
+    return WriteReg(I2S_SR_CTRL, rate);
+}
+//----------------------------------------------------------------------------------------------------------------------
+bool AC101::SetI2sMode(I2sMode_t mode) {
+    uint16_t val = ReadReg(I2S1LCK_CTRL);
+    val &= ~0x8000;
+    val |= uint16_t(mode) << 15;
+    return WriteReg(I2S1LCK_CTRL, val);
+}
+//----------------------------------------------------------------------------------------------------------------------
+bool AC101::SetI2sWordSize(I2sWordSize_t size) {
+    uint16_t val = ReadReg(I2S1LCK_CTRL);
+    val &= ~0x0030;
+    val |= uint16_t(size) << 4;
+    return WriteReg(I2S1LCK_CTRL, val);
+}
+//----------------------------------------------------------------------------------------------------------------------
+bool AC101::SetI2sFormat(I2sFormat_t format) {
+    uint16_t val = ReadReg(I2S1LCK_CTRL);
+    val &= ~0x000C;
+    val |= uint16_t(format) << 2;
+    return WriteReg(I2S1LCK_CTRL, val);
+}
+//----------------------------------------------------------------------------------------------------------------------
+bool AC101::SetI2sClock(I2sBitClockDiv_t bitClockDiv, bool bitClockInv, I2sLrClockDiv_t lrClockDiv, bool lrClockInv) {
+    uint16_t val = ReadReg(I2S1LCK_CTRL);
+    val &= ~0x7FC0;
+    val |= uint16_t(bitClockInv ? 1 : 0) << 14;
+    val |= uint16_t(bitClockDiv) << 9;
+    val |= uint16_t(lrClockInv ? 1 : 0) << 13;
+    val |= uint16_t(lrClockDiv) << 6;
+    return WriteReg(I2S1LCK_CTRL, val);
+}
+//----------------------------------------------------------------------------------------------------------------------
+bool AC101::SetMode(Mode_t mode) {
+    bool ok = true;
+    if(MODE_LINE == mode) {
+        ok &= WriteReg(ADC_SRC, 0x0408);
+        ok &= WriteReg(ADC_DIG_CTRL, 0x8000);
+        ok &= WriteReg(ADC_APC_CTRL, 0x3bc0);
+    }
+
+    if((MODE_ADC == mode) or (MODE_ADC_DAC == mode) or (MODE_LINE == mode)) {
+        ok &= WriteReg(MOD_CLK_ENA, 0x800c);
+        ok &= WriteReg(MOD_RST_CTRL, 0x800c);
+    }
+
+    if((MODE_DAC == mode) or (MODE_ADC_DAC == mode) or (MODE_LINE == mode)) {
+        // Enable Headphone output
+        ok &= WriteReg(OMIXER_DACA_CTRL, 0xff80);
+        ok &= WriteReg(HPOUT_CTRL, 0xc3c1);
+        ok &= WriteReg(HPOUT_CTRL, 0xcb00);
+        delay(100);
+        ok &= WriteReg(HPOUT_CTRL, 0xfbc0);
+        ok &= SetVolumeHeadphone(30);
+
+        // Enable Speaker output
+        ok &= WriteReg(SPKOUT_CTRL, 0xeabd);
+        delay(10);
+        ok &= SetVolumeSpeaker(30);
+    }
+    return ok;
+}

lib/ESP32-audioI2S/examples/AC101/AC101.h

@@ -0,0 +1,166 @@
+/*
+	AC101 - An AC101 Codec driver library for Arduino
+	Copyright (C) 2019, Ivo Pullens, Emmission
+
+	Inspired by:
+	https://github.com/donny681/esp-adf/tree/master/components/audio_hal/driver/AC101
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef AC101_H
+#define AC101_H
+
+#include <Arduino.h>
+#include <inttypes.h>
+#include <Wire.h>
+
+class AC101
+{
+public:
+	typedef enum {
+		SAMPLE_RATE_8000	= 0x0000,
+		SAMPLE_RATE_11052	= 0x1000,
+		SAMPLE_RATE_12000	= 0x2000,
+		SAMPLE_RATE_16000	= 0x3000,
+		SAMPLE_RATE_22050	= 0x4000,
+		SAMPLE_RATE_24000	= 0x5000,
+		SAMPLE_RATE_32000	= 0x6000,
+		SAMPLE_RATE_44100	= 0x7000,
+		SAMPLE_RATE_48000	= 0x8000,
+		SAMPLE_RATE_96000	= 0x9000,
+		SAMPLE_RATE_192000	= 0xa000,
+	} I2sSampleRate_t;
+
+	typedef enum {
+		MODE_MASTER			= 0x00,
+		MODE_SLAVE			= 0x01,
+	} I2sMode_t;
+
+	typedef enum {
+		WORD_SIZE_8_BITS	= 0x00,
+		WORD_SIZE_16_BITS	= 0x01,
+		WORD_SIZE_20_BITS	= 0x02,
+		WORD_SIZE_24_BITS	= 0x03,
+	} I2sWordSize_t;
+
+	typedef enum {
+		DATA_FORMAT_I2S		= 0x00,
+		DATA_FORMAT_LEFT	= 0x01,
+		DATA_FORMAT_RIGHT	= 0x02,
+		DATA_FORMAT_DSP		= 0x03,
+	} I2sFormat_t;
+
+	typedef enum {
+		BCLK_DIV_1			= 0x0,
+		BCLK_DIV_2			= 0x1,
+		BCLK_DIV_4			= 0x2,
+		BCLK_DIV_6			= 0x3,
+		BCLK_DIV_8			= 0x4,
+		BCLK_DIV_12			= 0x5,
+		BCLK_DIV_16			= 0x6,
+		BCLK_DIV_24			= 0x7,
+		BCLK_DIV_32			= 0x8,
+		BCLK_DIV_48			= 0x9,
+		BCLK_DIV_64			= 0xa,
+		BCLK_DIV_96			= 0xb,
+		BCLK_DIV_128		= 0xc,
+		BCLK_DIV_192		= 0xd,
+	} I2sBitClockDiv_t;
+
+	typedef enum {
+		LRCK_DIV_16			= 0x0,
+		LRCK_DIV_32			= 0x1,
+		LRCK_DIV_64			= 0x2,
+		LRCK_DIV_128		= 0x3,
+		LRCK_DIV_256		= 0x4,
+	} I2sLrClockDiv_t;
+
+
+	typedef enum {
+		MODE_ADC,
+		MODE_DAC,
+		MODE_ADC_DAC,
+		MODE_LINE
+	} Mode_t;
+
+	// Constructor.
+  	AC101(TwoWire  *TwoWireInstance = &Wire);
+
+	// Initialize codec, using provided I2C pins and bus frequency.
+	// @return True on success, false on failure.
+	bool begin(int32_t sda = -1, int32_t scl = -1, uint32_t frequency = 400000);
+
+	// Get speaker volume.
+	// @return Speaker volume, [63..0] for [0..-43.5] [dB], in increments of 2.
+	uint8_t GetVolumeSpeaker();
+
+	// Set speaker volume.
+	// @param volume   Target volume, [63..0] for [0..-43.5] [dB], in increments of 2.
+	// @return True on success, false on failure.
+	bool SetVolumeSpeaker(uint8_t volume);
+
+	// Get headphone volume.
+	// @return Headphone volume, [63..0] for [0..-62] [dB]
+	uint8_t GetVolumeHeadphone();
+
+	// Set headphone volume
+	// @param volume   Target volume, [63..0] for [0..-62] [dB]
+	// @return True on success, false on failure.
+	bool SetVolumeHeadphone(uint8_t volume);
+
+	// Configure I2S samplerate.
+	// @param rate   Samplerate.
+	// @return True on success, false on failure.
+	bool SetI2sSampleRate(I2sSampleRate_t rate);
+
+	// Configure I2S mode (master/slave).
+	// @param mode   Mode.
+	// @return True on success, false on failure.
+	bool SetI2sMode(I2sMode_t mode);
+
+	// Configure I2S word size (8/16/20/24 bits).
+	// @param size   Word size.
+	// @return True on success, false on failure.
+	bool SetI2sWordSize(I2sWordSize_t size);
+
+	// Configure I2S format (I2S/Left/Right/Dsp).
+	// @param format   I2S format.
+	// @return True on success, false on failure.
+	bool SetI2sFormat(I2sFormat_t format);
+
+	// Configure I2S clock.
+	// @param bitClockDiv   I2S1CLK/BCLK1 ratio.
+	// @param bitClockInv   I2S1 BCLK Polarity.
+	// @param lrClockDiv    BCLK1/LRCK ratio.
+	// @param lrClockInv    I2S1 LRCK Polarity.
+	// @return True on success, false on failure.
+	bool SetI2sClock(I2sBitClockDiv_t bitClockDiv, bool bitClockInv, I2sLrClockDiv_t lrClockDiv, bool lrClockInv);
+
+	// Configure the mode (Adc/Dac/Adc+Dac/Line)
+	// @param mode    Operating mode.
+	// @return True on success, false on failure.
+	bool SetMode(Mode_t mode);
+
+	// Dumpt the current register configuration to serial.
+	void DumpRegisters();
+	
+protected:
+	bool WriteReg(uint8_t reg, uint16_t val);
+	uint16_t ReadReg(uint8_t reg);
+private:
+	TwoWire *_TwoWireInstance = NULL;	// TwoWire Instance
+};
+
+#endif

lib/ESP32-audioI2S/examples/AC101/main.cpp

@@ -0,0 +1,116 @@
+#include "Arduino.h"
+#include "WiFi.h"
+#include "SPI.h"
+#include "SD.h"
+#include "FS.h"
+#include "Wire.h"
+#include "AC101.h"
+#include "Audio.h"
+
+// I2S GPIOs, the names refer on AC101, AS1 Audio Kit V2.2 2379
+#define I2S_DSIN      35 // pin not used
+#define I2S_BCLK      27
+#define I2S_LRC       26
+#define I2S_MCLK       0
+#define I2S_DOUT      25
+
+// I2C GPIOs
+#define IIC_CLK       32
+#define IIC_DATA      33
+
+// amplifier enable
+#define GPIO_PA_EN    21
+
+//Switch S1: 1-OFF, 2-ON, 3-ON, 4-OFF, 5-OFF
+
+String ssid =     "*****";
+String password = "*****";
+
+static AC101 dac;                                 // AC101
+int volume = 40;                                  // 0...100
+
+Audio audio;
+
+//#####################################################################
+
+void setup()
+{
+  Serial.begin(115200);
+
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid.c_str(), password.c_str());
+
+  while (WiFi.status() != WL_CONNECTED)
+  {
+    Serial.print(".");
+    delay(100);
+  }
+
+  Serial.printf_P(PSTR("Connected\r\nRSSI: "));
+  Serial.print(WiFi.RSSI());
+  Serial.print(" IP: ");
+  Serial.println(WiFi.localIP());
+
+    Serial.printf("Connect to DAC codec... ");
+    while (not dac.begin(IIC_DATA, IIC_CLK))
+    {
+        Serial.printf("Failed!\n");
+        delay(1000);
+    }
+    Serial.printf("OK\n");
+
+    dac.SetVolumeSpeaker(volume);
+    dac.SetVolumeHeadphone(volume);
+//  ac.DumpRegisters();
+
+    // Enable amplifier
+    pinMode(GPIO_PA_EN, OUTPUT);
+    digitalWrite(GPIO_PA_EN, HIGH);
+
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT, I2S_MCLK);
+    audio.setVolume(10); // 0...21
+
+    audio.connecttohost("http://mp3channels.webradio.antenne.de:80/oldies-but-goldies");
+//  audio.connecttohost("http://dg-rbb-http-dus-dtag-cdn.cast.addradio.de/rbb/antennebrandenburg/live/mp3/128/stream.mp3");
+//  audio.connecttospeech("Wenn die Hunde schlafen, kann der Wolf gut Schafe stehlen.", "de");
+
+}
+
+//-----------------------------------------------------------------------
+
+void loop(){
+    vTaskDelay(1);
+    audio.loop();
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}
+void audio_eof_speech(const char *info){
+    Serial.print("eof_speech  ");Serial.println(info);
+}

lib/ESP32-audioI2S/examples/DLNA/.vscode/c_cpp_properties.json

@@ -0,0 +1,504 @@
+//
+// !!! WARNING !!! AUTO-GENERATED FILE!
+// PLEASE DO NOT MODIFY IT AND USE "platformio.ini":
+// https://docs.platformio.org/page/projectconf/section_env_build.html#build-flags
+//
+{
+    "configurations": [
+        {
+            "name": "PlatformIO",
+            "includePath": [
+                "/media/wolle/DRIVE-N-GO/platformio-workspace/ESP32_WebServer/include",
+                "/media/wolle/DRIVE-N-GO/platformio-workspace/ESP32_WebServer/src",
+                "/media/wolle/DRIVE-N-GO/platformio-workspace/ESP32_WebServer/lib/websrv",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/SD/src",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/SPI/src",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/FS/src",
+                "/media/wolle/DRIVE-N-GO/platformio-workspace/ESP32_WebServer/.pio/libdeps/esp32dev/Arduino_JSON/src",
+                "/media/wolle/DRIVE-N-GO/platformio-workspace/ESP32_WebServer/.pio/libdeps/esp32dev/SoapESP32/src",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/WiFi/src",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/newlib/platform_include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/freertos/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/freertos/include/esp_additions/freertos",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/freertos/port/xtensa/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/freertos/include/esp_additions",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_hw_support/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_hw_support/include/soc",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_hw_support/include/soc/esp32",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_hw_support/port/esp32",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_hw_support/port/esp32/private_include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/heap/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/log/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/lwip/include/apps",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/lwip/include/apps/sntp",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/lwip/lwip/src/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/lwip/port/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/lwip/port/esp32/include/arch",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/soc/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/soc/esp32",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/soc/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/hal/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/hal/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/hal/platform_port/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_rom/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_rom/include/esp32",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_rom/esp32",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_common/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_system/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_system/port/soc",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_system/port/public_compat",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/xtensa/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/xtensa/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/driver/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/driver/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_pm/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_ringbuf/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/efuse/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/efuse/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/vfs/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_wifi/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_event/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_netif/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_eth/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/tcpip_adapter/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_phy/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_phy/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_ipc/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/app_trace/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_timer/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/mbedtls/port/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/mbedtls/mbedtls/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/mbedtls/esp_crt_bundle/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/app_update/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/spi_flash/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bootloader_support/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/nvs_flash/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/pthread/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_gdbstub/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_gdbstub/xtensa",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_gdbstub/esp32",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/espcoredump/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/espcoredump/include/port/xtensa",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/wpa_supplicant/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/wpa_supplicant/port/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/wpa_supplicant/esp_supplicant/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/ieee802154/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/console",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/asio/asio/asio/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/asio/port/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/common/osi/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/include/esp32/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/common/api/include/api",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/common/btc/profile/esp/blufi/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/common/btc/profile/esp/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/host/bluedroid/api/include/api",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/esp_ble_mesh/mesh_common/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/esp_ble_mesh/mesh_common/tinycrypt/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/esp_ble_mesh/mesh_core",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/esp_ble_mesh/mesh_core/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/esp_ble_mesh/mesh_core/storage",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/esp_ble_mesh/btc/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/esp_ble_mesh/mesh_models/common/include",
+                "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/bt/esp_ble_mesh/mesh_models/client/include",
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+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/mdns/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_local_ctrl/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/sdmmc/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_serial_slave_link/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_websocket_client/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/expat/expat/expat/lib",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/expat/port/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/wear_levelling/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/fatfs/diskio",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/fatfs/vfs",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/fatfs/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/freemodbus/common/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/idf_test/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/idf_test/include/esp32",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/jsmn/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/json/cJSON",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/libsodium/libsodium/src/libsodium/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/libsodium/port_include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/mqtt/esp-mqtt/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/openssl/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/perfmon/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/spiffs/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/ulp/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/wifi_provisioning/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/rmaker_common/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/json_parser/upstream/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/json_parser/upstream",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/json_generator/upstream",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_schedule/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_rainmaker/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/gpio_button/button/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/qrcode/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/ws2812_led",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/dotprod/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/support/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/windows/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/windows/hann/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/windows/blackman/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/windows/blackman_harris/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/windows/blackman_nuttall/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/windows/nuttall/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/windows/flat_top/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/iir/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/fir/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/math/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/math/add/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/math/sub/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/math/mul/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/math/addc/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/math/mulc/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/math/sqrt/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/matrix/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/fft/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/dct/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/conv/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/common/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/kalman/ekf/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dsp/modules/kalman/ekf_imu13states/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp_littlefs/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include/tool",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include/typedef",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include/image",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include/math",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include/nn",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include/layer",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include/detect",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-dl/include/model_zoo",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-sr/src/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-sr/esp-tts/esp_tts_chinese/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp-sr/include/esp32",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp32-camera/driver/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/esp32-camera/conversions/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/include/fb_gfx/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/tools/sdk/esp32/qio_qspi/include",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/cores/esp32",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/variants/esp32",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/ArduinoOTA/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/AsyncUDP/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/BLE/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/BluetoothSerial/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/DNSServer/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/EEPROM/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/ESP32/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/ESPmDNS/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/Ethernet/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/FFat/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/HTTPClient/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/HTTPUpdate/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/HTTPUpdateServer/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/I2S/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/LittleFS/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/NetBIOS/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/Preferences/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/RainMaker/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/SD_MMC/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/SPIFFS/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/SimpleBLE/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/Ticker/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/USB/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/Update/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/WebServer/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/WiFiClientSecure/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/WiFiProv/src",
+                    "/home/wolle/.platformio/packages/framework-arduinoespressif32@src-f2ea83e2545300b10a69ff44ef9dc6cd/libraries/Wire/src",
+                    ""
+                ]
+            },
+            "defines": [
+                "PLATFORMIO=60105",
+                "ARDUINO_ESP32_DEV",
+                "CORE_DEBUG_LEVEL=3",
+                "CONFIG_ARDUHAL_LOG_COLORS",
+                "BOARD_HAS_PSRAM",
+                "ARDUINO_RUNNING_CORE=3",
+                "ARDUINO_EVENT_RUNNING_CORE=1",
+                "HAVE_CONFIG_H",
+                "MBEDTLS_CONFIG_FILE=\"mbedtls/esp_config.h\"",
+                "UNITY_INCLUDE_CONFIG_H",
+                "WITH_POSIX",
+                "_GNU_SOURCE",
+                "IDF_VER=\"v4.4.2\"",
+                "ESP_PLATFORM",
+                "_POSIX_READER_WRITER_LOCKS",
+                "ARDUINO_ARCH_ESP32",
+                "ESP32",
+                "F_CPU=240000000L",
+                "ARDUINO=10812",
+                "ARDUINO_VARIANT=\"esp32\"",
+                "ARDUINO_BOARD=\"Espressif ESP32 Dev Module\"",
+                "ARDUINO_PARTITION_default",
+                ""
+            ],
+            "cStandard": "c99",
+            "cppStandard": "c++11",
+            "compilerPath": "/home/wolle/.platformio/packages/toolchain-xtensa-esp32/bin/xtensa-esp32-elf-gcc",
+            "compilerArgs": [
+                "-mlongcalls",
+                ""
+            ]
+        }
+    ],
+    "version": 4
+}

lib/ESP32-audioI2S/examples/DLNA/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

lib/ESP32-audioI2S/examples/DLNA/.vscode/launch.json

@@ -0,0 +1,44 @@
+// AUTOMATICALLY GENERATED FILE. PLEASE DO NOT MODIFY IT MANUALLY
+//
+// PIO Unified Debugger
+//
+// Documentation: https://docs.platformio.org/page/plus/debugging.html
+// Configuration: https://docs.platformio.org/page/projectconf/section_env_debug.html
+
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug",
+            "executable": "/media/wolle/DRIVE-N-GO/platformio-workspace/ESP32_WebServer/.pio/build/esp32dev/firmware.elf",
+            "projectEnvName": "esp32dev",
+            "toolchainBinDir": "/home/wolle/.platformio/packages/toolchain-xtensa-esp32/bin",
+            "internalConsoleOptions": "openOnSessionStart",
+            "preLaunchTask": {
+                "type": "PlatformIO",
+                "task": "Pre-Debug"
+            }
+        },
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug (skip Pre-Debug)",
+            "executable": "/media/wolle/DRIVE-N-GO/platformio-workspace/ESP32_WebServer/.pio/build/esp32dev/firmware.elf",
+            "projectEnvName": "esp32dev",
+            "toolchainBinDir": "/home/wolle/.platformio/packages/toolchain-xtensa-esp32/bin",
+            "internalConsoleOptions": "openOnSessionStart"
+        },
+        {
+            "type": "platformio-debug",
+            "request": "launch",
+            "name": "PIO Debug (without uploading)",
+            "executable": "/media/wolle/DRIVE-N-GO/platformio-workspace/ESP32_WebServer/.pio/build/esp32dev/firmware.elf",
+            "projectEnvName": "esp32dev",
+            "toolchainBinDir": "/home/wolle/.platformio/packages/toolchain-xtensa-esp32/bin",
+            "internalConsoleOptions": "openOnSessionStart",
+            "loadMode": "manual"
+        }
+    ]
+}

lib/ESP32-audioI2S/examples/DLNA/include/README

@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

lib/ESP32-audioI2S/examples/DLNA/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

lib/ESP32-audioI2S/examples/DLNA/lib/websrv/websrv.cpp

@@ -0,0 +1,721 @@
+/*
+ * websrv.cpp
+ *
+ *  Created on: 09.07.2017
+ *  updated on: 19.10.2022
+ *      Author: Wolle
+ */
+
+#include "websrv.h"
+
+//--------------------------------------------------------------------------------------------------------------
+WebSrv::WebSrv(String Name, String Version){
+    _Name=Name; _Version=Version;
+    method = HTTP_NONE;
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::show_not_found(){
+    cmdclient.print("HTTP/1.1 404 Not Found\n\n");
+    return;
+}
+//--------------------------------------------------------------------------------------------------------------
+String WebSrv::calculateWebSocketResponseKey(String sec_WS_key){
+    // input  Sec-WebSocket-Key from client
+    // output Sec-WebSocket-Accept-Key (used in response message to client)
+    uint8_t sha1_result[20];
+    String concat = sec_WS_key + WS_sec_conKey;
+    mbedtls_sha1((unsigned char*)concat.c_str(), concat.length(), (unsigned char*) sha1_result );
+    return base64::encode(sha1_result, 20);
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::printWebSocketHeader(String wsRespKey){
+    String wsHeader = (String)"HTTP/1.1 101 Switching Protocols\r\n"  +
+                              "Upgrade: websocket\r\n"  +
+                              "Connection: Upgrade\r\n" +
+                              "Sec-WebSocket-Accept: "  + wsRespKey + "\r\n" +
+                              "Access-Control-Allow-Origin: \r\n\r\n";
+                             // "Sec-WebSocket-Protocol: chat\r\n\r\n";
+    //log_i("wsheader %s", wsHeader.c_str());
+    webSocketClient.print(wsHeader) ;             // header sent
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::show(const char* pagename, int16_t len){
+    uint TCPCHUNKSIZE = 1024;   // Max number of bytes per write
+    size_t pagelen=0, res=0;                    // Size of requested page
+    const unsigned char* p;
+    p = reinterpret_cast<const unsigned char*>(pagename);
+    if(len==-1){
+        pagelen=strlen(pagename);
+    }
+    else{
+        if(len>0) pagelen = len;
+    }
+    while((*p=='\n') && (pagelen>0)){         // If page starts with newline:
+        p++;                            // Skip first character
+        pagelen--;
+    }
+    // HTTP header
+    String httpheader="";
+    httpheader += "HTTP/1.1 200 OK\r\n";
+    httpheader += "Connection: close\r\n";
+    httpheader += "Content-type: text/html\r\n";
+    httpheader += "Content-Length: " + String(pagelen, 10) + "\r\n";
+    httpheader += "Server: " + _Name+ "\r\n";
+    httpheader += "Cache-Control: max-age=86400\r\n";
+    httpheader += "Last-Modified: " + _Version + "\r\n\r\n";
+
+    cmdclient.print(httpheader) ;             // header sent
+
+    sprintf(buff, "Length of page is %d", pagelen);
+    if(WEBSRV_onInfo) WEBSRV_onInfo(buff);
+    // The content of the HTTP response follows the header:
+
+    while(pagelen){                       // Loop through the output page
+        if (pagelen <= TCPCHUNKSIZE){     // Near the end?
+            res=cmdclient.write(p, pagelen);  // Yes, send last part
+            if(res!=pagelen){
+                log_e("write error in webpage");
+                cmdclient.clearWriteError();
+                return;
+            }
+            pagelen = 0;
+        }
+        else{
+
+            res=cmdclient.write(p, TCPCHUNKSIZE);   // Send part of the page
+
+            if(res!=TCPCHUNKSIZE){
+                log_e("write error in webpage");
+                cmdclient.clearWriteError();
+                return;
+            }
+            p += TCPCHUNKSIZE;                  // Update startpoint and rest of bytes
+            pagelen -= TCPCHUNKSIZE;
+        }
+    }
+    return;
+}
+//--------------------------------------------------------------------------------------------------------------
+boolean WebSrv::streamfile(fs::FS &fs,const char* path){ // transfer file from SD to webbrowser
+    size_t bytesPerTransaction = 1024;
+    uint8_t transBuf[bytesPerTransaction], i=0;
+    size_t wIndex = 0, res=0, leftover=0;
+    if(!cmdclient.connected()){log_e("not connected"); return false;}
+    while(path[i] != 0){     // protect SD for invalid signs to avoid a crash!!
+        if(path[i] < 32)return false;
+        i++;
+    }
+    if(!fs.exists(path)) return false;
+    File file = fs.open(path, "r");
+    if(!file){
+        sprintf(buff, "Failed to open file for reading %s", path);
+        if(WEBSRV_onInfo) WEBSRV_onInfo(buff);
+        show_not_found();
+        return false;
+    }
+    sprintf(buff, "Length of file %s is %d", path, file.size());
+    if(WEBSRV_onInfo) WEBSRV_onInfo(buff);
+
+    // HTTP header
+    String httpheader="";
+    httpheader += "HTTP/1.1 200 OK\r\n";
+    httpheader += "Connection: close\r\n";
+    httpheader += "Content-type: " + getContentType(String(path)) +"\r\n";
+    httpheader += "Content-Length: " + String(file.size(),10) + "\r\n";
+    httpheader += "Server: " + _Name+ "\r\n";
+    httpheader += "Cache-Control: max-age=86400\r\n";
+    httpheader += "Last-Modified: " + _Version + "\r\n\r\n";
+
+    cmdclient.print(httpheader) ;             // header sent
+
+    while(wIndex+bytesPerTransaction < file.size()){
+        file.read(transBuf, bytesPerTransaction);
+        res=cmdclient.write(transBuf, bytesPerTransaction);
+        wIndex+=res;
+        if(res!=bytesPerTransaction){
+            log_i("write error %s", path);
+            cmdclient.clearWriteError();
+            return false;
+        }
+    }
+    leftover=file.size()-wIndex;
+    file.read(transBuf, leftover);
+    res=cmdclient.write(transBuf, leftover);
+    wIndex+=res;
+    if(res!=leftover){
+        log_i("write error %s", path);
+        cmdclient.clearWriteError();
+        return false;
+    }
+    if(wIndex!=file.size()) log_e("file %s not correct sent", path);
+    file.close();
+    return true;
+}
+//--------------------------------------------------------------------------------------------------------------
+boolean WebSrv::send(String msg, uint8_t opcode) {  // sends text messages via websocket
+    return send(msg.c_str(), opcode);
+}
+//--------------------------------------------------------------------------------------------------------------
+boolean WebSrv::send(const char *msg, uint8_t opcode) {  // sends text messages via websocket
+    uint8_t headerLen = 2;
+
+    if(!hasclient_WS) {
+//      log_e("can't send, websocketserver not connected");
+        return false;
+    }
+    size_t msgLen = strlen(msg);
+
+    if(msgLen > UINT16_MAX) {
+        log_e("send: message too long, greather than 64kB");
+        return false;
+    }
+
+    uint8_t fin = 1;
+    uint8_t rsv1 = 0;
+    uint8_t rsv2 = 0;
+    uint8_t rsv3 = 0;
+    uint8_t mask = 0;
+
+    buff[0] = (128 * fin) + (64 * rsv1) + (32 * rsv2) + (16 * rsv3) + opcode;
+    if(msgLen < 126) {
+        buff[1] = (128 * mask) + msgLen;
+    }
+    else {
+        headerLen = 4;
+        buff[1] = (128 * mask) + 126;
+        buff[2] = (msgLen >> 8) & 0xFF;
+        buff[3] = msgLen & 0xFF;
+    }
+
+    webSocketClient.write(buff, headerLen);
+    webSocketClient.write(msg, msgLen);
+
+    return true;
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::sendPing(){  // heartbeat, keep alive via websockets
+
+    if(!hasclient_WS) {
+        return;
+    }
+    uint8_t fin  = 1;
+    uint8_t rsv1 = 0;
+    uint8_t rsv2 = 0;
+    uint8_t rsv3 = 0;
+    uint8_t mask = 0;
+
+    buff[0] = (128 * fin) + (64 * rsv1) + (32 * rsv2) + (16 * rsv3) + Ping_Frame;
+    buff[1] = (128 * mask) + 0;
+    webSocketClient.write(buff,2);
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::sendPong(){  // heartbeat, keep alive via websockets
+
+    if(!hasclient_WS) {
+        return;
+    }
+    uint8_t fin  = 1;
+    uint8_t rsv1 = 0;
+    uint8_t rsv2 = 0;
+    uint8_t rsv3 = 0;
+    uint8_t mask = 0;
+
+    buff[0] = (128 * fin) + (64 * rsv1) + (32 * rsv2) + (16 * rsv3) + Pong_Frame;
+    buff[1] = (128 * mask) + 0;
+    webSocketClient.write(buff,2);
+}
+//--------------------------------------------------------------------------------------------------------------
+boolean WebSrv::uploadB64image(fs::FS &fs,const char* path, uint32_t contentLength){ // transfer imagefile from webbrowser to SD
+    size_t   bytesPerTransaction = 1024;
+    uint8_t  tBuf[bytesPerTransaction];
+    uint16_t av, i, j;
+    uint32_t len = contentLength;
+    boolean f_werror=false;
+    String str="";
+    int n=0;
+    File file;
+    fs.remove(path); // Remove a previous version, otherwise data is appended the file again
+    file = fs.open(path, FILE_WRITE);  // Open the file for writing (create it, if doesn't exist)
+
+    log_i("ContentLength %i", contentLength);
+    str = str + cmdclient.readStringUntil(','); // data:image/jpeg;base64,
+    len -= str.length();
+    while(cmdclient.available()){
+        av=cmdclient.available();
+        if(av==0) break;
+        if(av>bytesPerTransaction) av=bytesPerTransaction;
+        if(av>len) av=len;
+        len -= av;
+        i=0; j=0;
+        cmdclient.read(tBuf, av); // b64 decode
+        while(i<av){
+            if(tBuf[i]==0)break; // ignore all other stuff
+            n=B64index[tBuf[i]]<<18 | B64index[tBuf[i+1]]<<12 | B64index[tBuf[i+2]]<<6 | B64index[tBuf[i+3]];
+            tBuf[j  ]= n>>16;
+            tBuf[j+1]= n>>8 & 0xFF;
+            tBuf[j+2]= n & 0xFF;
+            i+=4;
+            j+=3;
+        }
+        if(tBuf[j]=='=') j--;
+        if(tBuf[j]=='=') j--; // remove =
+
+        if(file.write(tBuf, j)!=j) f_werror=true;  // write error?
+        if(len == 0) break;
+    }
+    cmdclient.readStringUntil('\n'); // read the remains, first \n
+    cmdclient.readStringUntil('\n'); // read the remains  webkit\n
+    file.close();
+    if(f_werror) {
+        sprintf(buff, "File: %s write error", path);
+        if(WEBSRV_onInfo) WEBSRV_onInfo(buff);
+        return false;
+    }
+    sprintf(buff, "File: %s written, FileSize: %d", path, contentLength);
+    //log_i(buff);
+    if(WEBSRV_onInfo) WEBSRV_onInfo(buff);
+    return true;
+}
+//--------------------------------------------------------------------------------------------------------------
+boolean WebSrv::uploadfile(fs::FS &fs,const char* path, uint32_t contentLength){ // transfer file from webbrowser to sd
+    size_t   bytesPerTransaction = 1024;
+    uint8_t  tBuf[bytesPerTransaction];
+    uint16_t av;
+    uint32_t len = contentLength;
+    boolean f_werror=false;
+    String str="";
+    File file;
+    if(fs.exists(path)) fs.remove(path); // Remove a previous version, otherwise data is appended the file again
+
+    file = fs.open(path, FILE_WRITE);  // Open the file for writing in SD (create it, if doesn't exist)
+    while(cmdclient.available()){
+        av=cmdclient.available();
+        if(av>bytesPerTransaction) av=bytesPerTransaction;
+        if(av>len) av=len;
+        len -= av;
+        cmdclient.read(tBuf, av);
+        if(file.write(tBuf, av)!=av) f_werror=true;  // write error?
+        if(len == 0) break;
+    }
+    cmdclient.readStringUntil('\n'); // read the remains, first \n
+    cmdclient.readStringUntil('\n'); // read the remains  webkit\n
+    file.close();
+    if(f_werror) {
+        sprintf(buff, "File: %s write error", path);
+        if(WEBSRV_onInfo) WEBSRV_onInfo(buff);
+        return false;
+    }
+    sprintf(buff, "File: %s written, FileSize %d: ", path, contentLength);
+    if(WEBSRV_onInfo)  WEBSRV_onInfo(buff);
+    return true;
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::begin(uint16_t http_port, uint16_t websocket_port) {
+    cmdserver.begin(http_port);
+    webSocketServer.begin(websocket_port);
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::stop() {
+    cmdclient.stop();
+    webSocketClient.stop();
+}
+//--------------------------------------------------------------------------------------------------------------
+String WebSrv::getContentType(String filename){
+    if      (filename.endsWith(".html")) return "text/html" ;
+    else if (filename.endsWith(".htm" )) return "text/html";
+    else if (filename.endsWith(".css" )) return "text/css";
+    else if (filename.endsWith(".txt" )) return "text/plain";
+    else if (filename.endsWith(".js"  )) return "application/javascript";
+    else if (filename.endsWith(".json")) return "application/json";
+    else if (filename.endsWith(".svg" )) return "image/svg+xml";
+    else if (filename.endsWith(".ttf" )) return "application/x-font-ttf";
+    else if (filename.endsWith(".otf" )) return "application/x-font-opentype";
+    else if (filename.endsWith(".xml" )) return "text/xml";
+    else if (filename.endsWith(".pdf" )) return "application/pdf";
+    else if (filename.endsWith(".png" )) return "image/png" ;
+    else if (filename.endsWith(".bmp" )) return "image/bmp" ;
+    else if (filename.endsWith(".gif" )) return "image/gif" ;
+    else if (filename.endsWith(".jpg" )) return "image/jpeg" ;
+    else if (filename.endsWith(".ico" )) return "image/x-icon" ;
+    else if (filename.endsWith(".css" )) return "text/css" ;
+    else if (filename.endsWith(".zip" )) return "application/x-zip" ;
+    else if (filename.endsWith(".gz"  )) return "application/x-gzip" ;
+    else if (filename.endsWith(".xls" )) return "application/msexcel" ;
+    else if (filename.endsWith(".mp3" )) return "audio/mpeg" ;
+    return "text/plain" ;
+}
+//--------------------------------------------------------------------------------------------------------------
+boolean WebSrv::handlehttp() {                // HTTPserver, message received
+    bool wswitch=true;
+    int16_t inx0, inx1, inx2, inx3;         // Pos. of search string in currenLine
+    String currentLine = "";                // Build up to complete line
+    String ct;                              // contentType
+    uint32_t contentLength = 0;                        // contentLength
+    uint8_t count = 0;
+
+    if (!cmdclient.connected()){
+        log_e("cmdclient schould be connected but is not!");
+        return false;
+    }
+    while (wswitch==true){                  // first while
+        if(!cmdclient.available()){
+            log_e("Command client schould be available but is not!");
+            return false;
+        }
+        currentLine = cmdclient.readStringUntil('\n');
+//        log_i("currLine %s", currentLine.c_str());
+        // If the current line is blank, you got two newline characters in a row.
+        // that's the end of the client HTTP request, so send a response:
+        if (currentLine.length() == 1) { // contains '\n' only
+            wswitch=false; // use second while
+            if (http_cmd.length()) {
+                if(WEBSRV_onInfo) WEBSRV_onInfo(URLdecode(http_cmd).c_str());
+                if(WEBSRV_onCommand) WEBSRV_onCommand(URLdecode(http_cmd), URLdecode(http_param), URLdecode(http_arg));
+            }
+            else if(http_rqfile.length()){
+                if(WEBSRV_onInfo) WEBSRV_onInfo(URLdecode(http_rqfile).c_str());
+                if(WEBSRV_onCommand) WEBSRV_onCommand(URLdecode(http_rqfile), URLdecode(http_param), URLdecode(http_arg));
+            }
+            else {   // An empty "GET"?
+                if(WEBSRV_onInfo) WEBSRV_onInfo("Filename is: index.html");
+                if(WEBSRV_onCommand) WEBSRV_onCommand("index.html", URLdecode(http_param), URLdecode(http_arg));
+            }
+            currentLine = "";
+            http_cmd    = "";
+            http_param  = "";
+            http_arg    = "";
+            http_rqfile = "";
+            method = HTTP_NONE;
+            break;
+        } else {
+            // Newline seen
+            inx0 = 0;
+
+            if (currentLine.startsWith("Content-Length:")) contentLength = currentLine.substring(15).toInt();
+
+            if (currentLine.startsWith("GET /")) {method = HTTP_GET; inx0 = 5;}  // GET request?
+            if (currentLine.startsWith("POST /")){method = HTTP_PUT; inx0 = 6;}  // POST request?
+            if (inx0 == 0) method = HTTP_NONE;
+
+            if(inx0>0){
+                inx1 = currentLine.indexOf("?");    // Search for 1st parameter
+                inx2 = currentLine.lastIndexOf("&");    // Search for 2nd parameter
+                inx3 = currentLine.indexOf(" HTTP");// Search for 3th parameter
+
+                if(inx1 > inx0){     // it is a command
+                    http_cmd = currentLine.substring(inx0, inx1);//isolate the command
+                    http_rqfile = "";               // No file
+                }
+                if((inx1>0) && (inx1+1 < inx3)){        // it is a parameter
+                    http_param = currentLine.substring(inx1+1, inx3);//isolate the parameter
+
+                    if(inx2>0){
+                        http_arg = currentLine.substring(inx2+1, inx3);//isolate the arguments
+                        http_param = currentLine.substring(inx1+1, inx2);//cut the parameter
+                    }
+                    http_rqfile = "";               // No file
+                }
+                if(inx1 < 0 && inx2 < 0){   // it is a filename
+                    http_rqfile = currentLine.substring(inx0, inx3);
+                    http_cmd =   "";
+                    http_param = "";
+                    http_arg =   "";
+                }
+            }
+            currentLine = "";
+        }
+    } //end first while
+    while(wswitch==false){                          // second while
+        if(cmdclient.available()) {
+            //log_i("%i", cmdclient.available());
+            currentLine = cmdclient.readStringUntil('\n');
+            //log_i("currLine %s", currentLine.c_str());
+            contentLength -= currentLine.length();
+        }
+        else{
+            currentLine = "";
+        }
+        if(!currentLine.length()){
+            return true;
+        }
+        if((currentLine.length() == 1 && count == 0) || count >= 2){
+            wswitch=true;  // use first while
+            currentLine = "";
+            count = 0;
+            break;
+        }
+        else{   // its the requestbody
+            if(currentLine.length() > 1){
+                if(WEBSRV_onRequest) WEBSRV_onRequest(currentLine, 0);
+                if(WEBSRV_onInfo) WEBSRV_onInfo(currentLine.c_str());
+            }
+
+            if(currentLine.startsWith("------")) {
+                count++; // WebKitFormBoundary header
+                contentLength -= (currentLine.length() + 2); // WebKitFormBoundary footer ist 2 chars longer
+            }
+            if(currentLine.length() == 1 && count == 1){
+                contentLength -= 6; // "\r\n\r\n..."
+                if(WEBSRV_onRequest) WEBSRV_onRequest("fileUpload", contentLength);
+                count++;
+            }
+        }
+
+    } // end second while
+    cmdclient.stop();
+    return true;
+}
+//--------------------------------------------------------------------------------------------------------------
+boolean WebSrv::handleWS() {                  // Websocketserver, receive messages
+    String currentLine = "";                // Build up to complete line
+
+    if (!webSocketClient.connected()){
+        log_e("webSocketClient schould be connected but is not!");
+        hasclient_WS = false;
+        return false;
+    }
+
+    if(!hasclient_WS){
+        while(true){
+            currentLine = webSocketClient.readStringUntil('\n');
+
+            if (currentLine.length() == 1) { // contains '\n' only
+                if(ws_conn_request_flag){
+                    ws_conn_request_flag = false;
+                    printWebSocketHeader(WS_resp_Key);
+                    hasclient_WS = true;
+                }
+                break;
+            }
+
+            if (currentLine.startsWith("Sec-WebSocket-Key:")) { // Websocket connection request
+                WS_sec_Key = currentLine.substring(18);
+                WS_sec_Key.trim();
+                WS_resp_Key = calculateWebSocketResponseKey(WS_sec_Key);
+                ws_conn_request_flag = true;
+            }
+        }
+    }
+    int av = webSocketClient.available();
+
+    if(av){
+        parseWsMessage(av);
+    }
+    return true;
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::parseWsMessage(uint32_t len){
+    uint8_t  headerLen = 2;
+    uint16_t paylodLen;
+    uint8_t  maskingKey[4];
+
+    if(len > UINT16_MAX){
+        log_e("Websocketmessage too long");
+        return;
+    }
+
+    webSocketClient.readBytes(buff, 1);
+    uint8_t fin       = ((buff[0] >> 7) & 0x01); (void)fin;
+    uint8_t rsv1      = ((buff[0] >> 6) & 0x01); (void)rsv1;
+    uint8_t rsv2      = ((buff[0] >> 5) & 0x01); (void)rsv2;
+    uint8_t rsv3      = ((buff[0] >> 4) & 0x01); (void)rsv3;
+    uint8_t opcode    = (buff[0]  & 0x0F);
+
+    webSocketClient.readBytes(buff, 1);
+    uint8_t mask      = ((buff[0]>>7) & 0x01);
+    paylodLen = (buff[0] & 0x7F);
+
+    if(paylodLen == 126){
+        headerLen = 4;
+        webSocketClient.readBytes(buff, 2);
+        paylodLen  = buff[0] << 8;
+        paylodLen += buff[1];
+
+    }
+
+    (void)headerLen;
+
+    if(mask){
+        maskingKey[0] = webSocketClient.read();
+        maskingKey[1] = webSocketClient.read();
+        maskingKey[2] = webSocketClient.read();
+        maskingKey[3] = webSocketClient.read();
+    }
+
+    if(opcode == 0x08) {  // denotes a connection close
+        hasclient_WS = false;
+        webSocketClient.stop();
+        return;
+    }
+
+    if(opcode == 0x09) {  // denotes a ping
+        if(WEBSRV_onCommand) WEBSRV_onCommand("ping received, send pong", "", "");
+        if(WEBSRV_onInfo) WEBSRV_onInfo("pong received, send pong");
+        sendPong();
+    }
+
+    if(opcode == 0x0A) {  // denotes a pong
+        if(WEBSRV_onCommand) WEBSRV_onCommand("pong received", "", "");
+        if(WEBSRV_onInfo) WEBSRV_onInfo("pong received");
+        return;
+    }
+
+    if(opcode == 0x01) { // denotes a text frame
+        int plen;
+        while(paylodLen){
+            if(paylodLen > 255){
+                plen = 255;
+                paylodLen -= webSocketClient.readBytes(buff, plen);
+            }
+            else{
+                plen = paylodLen;
+                paylodLen = 0;
+                webSocketClient.readBytes(buff, plen);
+            }
+            if(mask){
+                for(int i = 0; i < plen; i++){
+                    buff[i] = (buff[i] ^ maskingKey[i % 4]);
+                }
+            }
+            buff[plen] = 0;
+            if(WEBSRV_onInfo) WEBSRV_onInfo(buff);
+            if(len < 256){ // can be a command like "mute=1"
+                char *ret;
+                ret = strchr((const char*)buff, '=');
+                if(ret){
+                    *ret = 0;
+                    // log_i("cmd=%s, para=%s", buff, ret);
+                    if(WEBSRV_onCommand) WEBSRV_onCommand((const char*) buff, ret + 1, "");
+                    buff[0] = 0;
+                    return;
+                }
+            }
+            if(WEBSRV_onCommand) WEBSRV_onCommand((const char*) buff, "", "");
+        }
+        buff[0] = 0;
+    }
+}
+//--------------------------------------------------------------------------------------------------------------
+boolean WebSrv::loop() {
+
+    cmdclient = cmdserver.available();
+    if (cmdclient.available()){                                     // Check Input from client?
+        if(WEBSRV_onInfo) WEBSRV_onInfo("Command client available");
+        return handlehttp();
+    }
+
+    if(!webSocketClient.connected()){
+        hasclient_WS = false;
+    }
+    if(!hasclient_WS) webSocketClient = webSocketServer.available();
+    if (webSocketClient.available()){
+        if(WEBSRV_onInfo) WEBSRV_onInfo("WebSocket client available");
+        return handleWS();
+    }
+
+    return false;
+}
+//--------------------------------------------------------------------------------------------------------------
+void WebSrv::reply(const String &response, bool header){
+    if(header==true) {
+        int l= response.length();
+        // HTTP header
+        String httpheader="";
+        httpheader += "HTTP/1.1 200 OK\r\n";
+        httpheader += "Connection: close\r\n";
+        httpheader += "Content-type: text/html\r\n";
+        httpheader += "Content-Length: " + String(l, 10) + "\r\n";
+        httpheader += "Server: " + _Name+ "\r\n";
+        httpheader += "Cache-Control: max-age=3600\r\n";
+        httpheader += "Last-Modified: " + _Version + "\r\n\r\n";
+
+        cmdclient.print(httpheader) ;             // header sent
+    }
+    cmdclient.print(response);
+}
+//--------------------------------------------------------------------------------------------------------------
+String WebSrv::UTF8toASCII(String str){
+    uint16_t i=0;
+    String res="";
+    char tab[96]={
+          96,173,155,156, 32,157, 32, 32, 32, 32,166,174,170, 32, 32, 32,248,241,253, 32,
+          32,230, 32,250, 32, 32,167,175,172,171, 32,168, 32, 32, 32, 32,142,143,146,128,
+          32,144, 32, 32, 32, 32, 32, 32, 32,165, 32, 32, 32, 32,153, 32, 32, 32, 32, 32,
+         154, 32, 32,225,133,160,131, 32,132,134,145,135,138,130,136,137,141,161,140,139,
+          32,164,149,162,147, 32,148,246, 32,151,163,150,129, 32, 32,152
+    };
+    while(str[i]!=0){
+        if(str[i]==0xC2){ // compute unicode from utf8
+            i++;
+            if((str[i]>159)&&(str[i]<192)) res+=char(tab[str[i]-160]);
+            else res+=char(32);
+        }
+        else if(str[i]==0xC3){
+            i++;
+            if((str[i]>127)&&(str[i]<192)) res+=char(tab[str[i]-96]);
+            else res+=char(32);
+        }
+        else res+=str[i];
+        i++;
+    }
+    return res;
+}
+//--------------------------------------------------------------------------------------------------------------
+String WebSrv::URLdecode(String str){
+    String hex="0123456789ABCDEF";
+    String res="";
+    uint16_t i=0;
+    while(str[i]!=0){
+        if((str[i]=='%') && isHexadecimalDigit(str[i+1]) && isHexadecimalDigit(str[i+2])){
+            res+=char((hex.indexOf(str[i+1])<<4) + hex.indexOf(str[i+2])); i+=3;}
+        else{res+=str[i]; i++;}
+    }
+    return res;
+}
+//--------------------------------------------------------------------------------------------------------------
+String WebSrv::responseCodeToString(int code) {
+  switch (code) {
+    case 100: return F("Continue");
+    case 101: return F("Switching Protocols");
+    case 200: return F("OK");
+    case 201: return F("Created");
+    case 202: return F("Accepted");
+    case 203: return F("Non-Authoritative Information");
+    case 204: return F("No Content");
+    case 205: return F("Reset Content");
+    case 206: return F("Partial Content");
+    case 300: return F("Multiple Choices");
+    case 301: return F("Moved Permanently");
+    case 302: return F("Found");
+    case 303: return F("See Other");
+    case 304: return F("Not Modified");
+    case 305: return F("Use Proxy");
+    case 307: return F("Temporary Redirect");
+    case 400: return F("Bad Request");
+    case 401: return F("Unauthorized");
+    case 402: return F("Payment Required");
+    case 403: return F("Forbidden");
+    case 404: return F("Not Found");
+    case 405: return F("Method Not Allowed");
+    case 406: return F("Not Acceptable");
+    case 407: return F("Proxy Authentication Required");
+    case 408: return F("Request Time-out");
+    case 409: return F("Conflict");
+    case 410: return F("Gone");
+    case 411: return F("Length Required");
+    case 412: return F("Precondition Failed");
+    case 413: return F("Request Entity Too Large");
+    case 414: return F("Request-URI Too Large");
+    case 415: return F("Unsupported Media Type");
+    case 416: return F("Requested range not satisfiable");
+    case 417: return F("Expectation Failed");
+    case 500: return F("Internal Server Error");
+    case 501: return F("Not Implemented");
+    case 502: return F("Bad Gateway");
+    case 503: return F("Service Unavailable");
+    case 504: return F("Gateway Time-out");
+    case 505: return F("HTTP Version not supported");
+    default:  return "";
+  }
+}
+//--------------------------------------------------------------------------------------------------------------

lib/ESP32-audioI2S/examples/DLNA/lib/websrv/websrv.h

@@ -0,0 +1,96 @@
+/*
+ * websrv.h
+ *
+ *  Created on: 09.07.2017
+ *  updated on: 11.04.2022
+ *      Author: Wolle
+ */
+
+#ifndef WEBSRV_H_
+#define WEBSRV_H_
+#include "Arduino.h"
+#include "WiFi.h"
+#include "SD.h"
+#include "FS.h"
+#include "mbedtls/sha1.h"
+#include "base64.h"
+
+extern __attribute__((weak)) void WEBSRV_onInfo(const char*);
+extern __attribute__((weak)) void WEBSRV_onCommand(const String cmd, const String param, const String arg);
+extern __attribute__((weak)) void WEBSRV_onRequest(const String, uint32_t contentLength);
+
+
+
+class WebSrv
+{
+protected:
+    WiFiClient      cmdclient;                               // An instance of the client for commands
+    WiFiClient      webSocketClient ;
+    WiFiServer      cmdserver;
+    WiFiServer      webSocketServer;
+
+private:
+    bool            http_reponse_flag = false ;               // Response required
+    bool            ws_conn_request_flag = false;             // websocket connection attempt
+    bool            hasclient_WS = false;
+    String          http_rqfile ;                             // Requested file
+    String          http_cmd ;                                // Content of command
+    String          http_param;                               // Content of parameter
+    String          http_arg;                                 // Content of argument
+    String          _Name;
+    String          _Version;
+    String          contenttype;
+    char            buff[256];
+    uint8_t         method;
+    String          WS_sec_Key;
+    String          WS_resp_Key;
+    String          WS_sec_conKey = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
+
+protected:
+    String  calculateWebSocketResponseKey(String sec_WS_key);
+    void    printWebSocketHeader(String wsRespKey);
+    String  getContentType(String filename);
+    boolean handlehttp();
+    boolean handleWS();
+    void    parseWsMessage(uint32_t len);
+    uint8_t inbyte();
+    String  URLdecode(String str);
+    String  UTF8toASCII(String str);
+    String  responseCodeToString(int code);
+
+
+public:
+    enum { HTTP_NONE = 0, HTTP_GET = 1, HTTP_PUT = 2 };
+    enum { Continuation_Frame = 0x00, Text_Frame = 0x01, Binary_Frame = 0x02, Connection_Close_Frame = 0x08,
+           Ping_Frame = 0x09, Pong_Frame = 0x0A };
+    WebSrv(String Name="WebSrv library", String Version="1.0");
+    void begin(uint16_t http_port = 80, uint16_t websocket_port = 81);
+    void stop();
+    boolean loop();
+    void show(const char* pagename, int16_t len=-1);
+    void show_not_found();
+    boolean streamfile(fs::FS &fs,const char* path);
+    boolean send(String msg, uint8_t opcode = Text_Frame);
+    boolean send(const char* msg, uint8_t opcode = Text_Frame);
+    void    sendPing();
+    void    sendPong();
+    boolean uploadfile(fs::FS &fs,const char* path, uint32_t contentLength);
+    boolean uploadB64image(fs::FS &fs,const char* path, uint32_t contentLength);
+    void reply(const String &response, boolean header=true);
+    const char* ASCIItoUTF8(const char* str);
+
+private:
+    const int B64index[123] ={
+        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  62, 63, 62, 62, 63,
+        52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0,  0,  0,  0,  0,  0,
+        0,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14,
+        15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0,  0,  0,  0,  63,
+        0,  26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+        41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
+    };
+};
+
+
+#endif /* WEBSRV_H_ */

lib/ESP32-audioI2S/examples/DLNA/partitions.csv

@@ -0,0 +1,4 @@
+# Name,   Type, SubType, Offset,  Size
+nvs,      data, nvs,     0x9000,  0x4000
+phy_init, data, phy,     0xd000,  0x1000
+factory,  app,  factory, 0x10000, 3M,

lib/ESP32-audioI2S/examples/DLNA/platformio.ini

@@ -0,0 +1,61 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/en/latest/platforms/espressif32.html
+
+[env:esp32dev]
+platform = https://github.com/platformio/platform-espressif32.git#v6.5.0
+
+board = esp32dev ;chipmodel ESP32, 4M FLASH, USBtoTTL
+
+board_build.f_cpu = 240000000L
+board_build.flash_size=4MB
+board_build.flash_freq=80M
+board_build.spiram_mode=2
+framework = arduino
+monitor_speed = 115200
+monitor_filters = esp32_exception_decoder
+board_build.partitions = default.csv
+upload_speed = 460800  ; 921600, 512000, 460800, 256000, 115200
+
+lib_deps =
+    https://github.com/schreibfaul1/ESP32-audioI2S.git#3.0.8
+    https://github.com/yellobyte/SoapESP32.git#1.1.4
+    https://github.com/arduino-libraries/Arduino_JSON.git
+
+platform_packages =
+
+    framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#2.0.14
+
+board_upload.maximum_size = 3145728
+board_upload.flash_size = 4MB
+board_build.flash_mode = qio
+board_build.bootloader = dio
+
+;build_flags = -DCORE_DEBUG_LEVEL=0    ; None
+;build_flags = -DCORE_DEBUG_LEVEL=1    ; Error
+;build_flags = -DCORE_DEBUG_LEVEL=2    ; Warn
+;build_flags = -DCORE_DEBUG_LEVEL=3    ; Info
+;build_flags = -DCORE_DEBUG_LEVEL=4    ; Debug
+;build_flags = -DCORE_DEBUG_LEVEL=5    ; Verbose
+
+build_flags =
+;        -Wall
+;        -Wextra
+        -Wdouble-promotion             ; double to float warnings
+        -Wimplicit-fallthrough         ; switch case without break
+        -DCORE_DEBUG_LEVEL=3
+        -DCONFIG_ARDUHAL_LOG_COLORS
+        -DBOARD_HAS_PSRAM
+        -DARDUINO_RUNNING_CORE=3       ; Arduino Runs On Core (setup, loop)
+        -DARDUINO_EVENT_RUNNING_CORE=1 ; Events Run On Core
+;        -DAUDIO_LOG
+
+build_unflags =
+;       -DARDUINO_USB_CDC_ON_BOOT=0    ; traditional log
+;       -DBOARD_HAS_PSRAM

lib/ESP32-audioI2S/examples/DLNA/readme.md

@@ -0,0 +1,5 @@
+# DLNA
+ DLNA servers are available in many home networks. Many Internet routers (e.g. Fritzbox) have an integrated DLNA service. It is also easy to set up a own DLNA server (e.g. miniDLNA on a Raspberry Pi). The SoapESP32 library https://github.com/yellobyte/SoapESP32 used here automatically recognizes the DLNA servers available in the home network. Thanks to yellobyte for this library. Since the SW is too extensive for a sketch, I have published a complete project here. Simply download the repository and unzip the DLNA folder. You can open the project with PlatformIO. Change the access data and, if necessary, the GPIOs in main.cpp. If a DLNA server was detected, its content will be displayed in the browser. If an audio file is selected, the playback process begins using the audioI2S library.
+ <br>
+ Webpage
+![Webpage](https://github.com/schreibfaul1/ESP32-audioI2S/blob/master/examples/DLNA/additional_info/DLNA_web.jpg)

lib/ESP32-audioI2S/examples/DLNA/src/index.h

@@ -0,0 +1,287 @@
+/*
+ *  index.h
+ *
+ *  Created on: 13.12.2022
+ *  Updated on: 20.12.2022
+ *      Author: Wolle
+ *
+ *  ESP32 - DLNA
+ *
+ */
+
+#ifndef INDEX_H_
+#define INDEX_H_
+
+#include "Arduino.h"
+
+// file in raw data format for PROGMEM
+
+const char index_html[] PROGMEM = R"=====(
+<!DOCTYPE HTML>
+<html>
+<head>
+    <title>ESP32 - DLNA</title>
+    <style type="text/css">           /* optimized with csstidy */
+        html {  /* This is the groundplane */
+            font-family : serif;
+            height : 100%;
+            font-size: 16px;
+            color : DarkSlateGray;
+            background-color : navy;
+            margin : 0;
+            padding : 0;
+        }
+        #content {
+            min-height : 540px;
+            min-width : 725px;
+            overflow : hidden;
+            background-color : lightskyblue;
+            margin : 0;
+            padding : 5px;
+        }
+        #tab-content1 {
+            margin : 20px;
+        }
+        .boxstyle {
+            height : 36px;
+            padding-top : 0;
+            padding-left : 15px;
+            padding-bottom : 0;
+            background-color: white;
+            font-size : 16px;
+            line-height : normal;
+            border-color: black;
+            border-style: solid;
+            border-width: thin;
+            border-radius : 5px;
+        }
+        #BODY { display:block; }
+    </style>
+</head>
+<script>
+    // global variables and functions
+
+// ---- websocket section------------------------
+
+var socket = undefined
+var host = location.hostname
+var tm
+
+function ping() {
+    if (socket.readyState == 1) { // reayState 'open'
+        socket.send("ping")
+        console.log("send ping")
+        tm = setTimeout(function () {
+            console.log('The connection to the ESP32 is interrupted! Please reload the page!')
+        }, 10000)
+    }
+}
+
+function connect() {
+    socket = new WebSocket('ws://'+window.location.hostname+':81/');
+
+    socket.onopen = function () {
+        console.log("Websocket connected")
+        socket.send('DLNA_getServer')
+        setInterval(ping, 20000)
+    };
+
+    socket.onclose = function (e) {
+        console.log(e)
+        console.log('Socket is closed. Reconnect will be attempted in 1 second.', e)
+        socket = null
+        setTimeout(function () {
+          connect()
+        }, 1000)
+    }
+
+    socket.onerror = function (err) {
+        console.log(err)
+    }
+
+    socket.onmessage = function(event) {
+        var socketMsg = event.data
+        var n   = socketMsg.indexOf('=')
+        var msg = ''
+        var val = ''
+        if (n >= 0) {
+            var msg  = socketMsg.substring(0, n)
+            var val  = socketMsg.substring(n + 1)
+        // console.log("para ",msg, " val ",val)
+        }
+        else {
+          msg = socketMsg
+        }
+
+        switch(msg) {
+            case "pong":            clearTimeout(tm)
+                                    break
+            case "DLNA_Names":      showServer(val)
+                                    break
+            case "Level1":          show_DLNA_Content(val, 1)
+                                    break
+            case "Level2":          show_DLNA_Content(val, 2)
+                                    break
+            case "Level3":          show_DLNA_Content(val, 3)
+                                    break
+            case "Level4":          show_DLNA_Content(val, 4)
+                                    break
+            case "Level5":          show_DLNA_Content(val, 5)
+                                    break
+            default:                console.log('unknown message', msg, val)
+        }
+    }
+}
+// ---- end websocket section------------------------
+
+document.addEventListener('readystatechange', event => {
+  if (event.target.readyState === 'interactive') { // same as:  document.addEventListener('DOMContentLoaded'...
+    // same as  jQuery.ready
+    console.log('All HTML DOM elements are accessible')
+    // document.getElementById('dialog').style.display = 'none' // hide the div (its only a template)
+
+  }
+  if (event.target.readyState === 'complete') {
+    console.log('Now external resources are loaded too, like css,src etc... ')
+    connect();  // establish websocket connection
+  }
+})
+
+function showServer(val){
+    console.log(val)
+    var select = document.getElementById('server')
+    select.options.length = 0;
+    var server = val.split(",")
+    for (i = -1; i < (server.length); i++) {
+        opt = document.createElement('OPTION')
+        if(i == -1){
+          opt.value = ""
+          opt.text =  "Select a DLNA Server here"
+        }
+        else{
+          console.log(server[i])
+          opt.value = server[i]
+          opt.text =  server[i]
+        }
+        select.add(opt)
+    }
+}
+
+function show_DLNA_Content(val, level){
+    var select
+    if(level == 1) select = document.getElementById('level1')
+    if(level == 2) select = document.getElementById('level2')
+    if(level == 3) select = document.getElementById('level3')
+    if(level == 4) select = document.getElementById('level4')
+    if(level == 5) select = document.getElementById('level5')
+    content =JSON.parse(val)
+    //console.log(ct[1].name)
+    select.options.length = 0;
+    for (i = -1; i < (content.length); i++) {
+        opt = document.createElement('OPTION')
+        if(i == -1){
+            opt.value = ""
+            opt.text =  "Select level " + level.toString()
+        }
+        else{
+            var n
+            var c
+            if(content[i].isDir == true){
+                n = content[i].name.concat('\xa0\xa0', '<DIR>'); // more than one space
+                c = 'D=' + content[i].id // is directory
+            }
+            else{
+                n = content[i].name + '\xa0\xa0' + content[i].size;
+                c = 'F=' + content[i].id // is file
+            }
+            opt.value = c
+            opt.text  = n
+        }
+        select.add(opt)
+    }
+}
+
+function selectserver (presctrl) { // preset, select a server, root, level0
+    socket.send('DLNA_getContent0=' + presctrl.value)
+    select = document.getElementById('level1'); select.options.length = 0; // clear next level
+    select = document.getElementById('level2'); select.options.length = 0;
+    select = document.getElementById('level3'); select.options.length = 0;
+    select = document.getElementById('level4'); select.options.length = 0;
+    select = document.getElementById('level5'); select.options.length = 0;
+    console.log('DLNA_getContent0=' + presctrl.value)
+}
+
+function select_l1 (presctrl) { // preset, select root
+    socket.send('DLNA_getContent1=' + presctrl.value)
+    select = document.getElementById('level2'); select.options.length = 0; // clear next level
+    select = document.getElementById('level3'); select.options.length = 0;
+    select = document.getElementById('level4'); select.options.length = 0;
+    select = document.getElementById('level5'); select.options.length = 0;
+    console.log('DLNA_getContent1=' + presctrl.value)
+}
+
+function select_l2 (presctrl) { // preset, select level 1
+    socket.send('DLNA_getContent2=' + presctrl.value)
+    select = document.getElementById('level3'); select.options.length = 0;
+    select = document.getElementById('level4'); select.options.length = 0;
+    select = document.getElementById('level5'); select.options.length = 0;
+    console.log('DLNA_getContent2=' + presctrl.value)
+}
+
+function select_l3 (presctrl) { // preset, select level 2
+    socket.send('DLNA_getContent3=' + presctrl.value)
+    select = document.getElementById('level4'); select.options.length = 0;
+    select = document.getElementById('level5'); select.options.length = 0;
+    console.log('DLNA_getContent3=' + presctrl.value)
+ }
+
+ function select_l4 (presctrl) { // preset, select level 3
+    socket.send('DLNA_getContent4=' + presctrl.value)
+    select = document.getElementById('level5'); select.options.length = 0;
+    console.log('DLNA_getContent4=' + presctrl.value)
+ }
+
+ function select_l5 (presctrl) { // preset, select level 4
+    socket.send('DLNA_getContent5=' + presctrl.value)
+    console.log('DLNA_getContent5=' + presctrl.value)
+ }
+
+</script>
+<body id="BODY">
+    <!--==============================================================================================-->
+<div id="content">
+<div id="content1">
+    <div style="font-size: 50px; text-align: center; flex: 1;">
+      ESP32 - DLNA
+    </div>
+    <div style="display: flex;">
+        <div style="flex: 0 0 calc(100% - 0px);">
+            <select class="boxstyle" style="width: 100%;" onchange="selectserver(this)" id="server">
+                <option value="-1">Select a DLNA Server here</option>
+            </select>
+            <select class="boxstyle" style="width: 100%; margin-top: 5px;" onchange="select_l1(this)" id="level1">
+                 <option value="-1"> </option>
+            </select>
+            <select class="boxstyle" style="width: 100%; margin-top: 5px;" onchange="select_l2(this)" id="level2">
+                <option value="-1"> </option>
+            </select>
+            <select class="boxstyle" style="width: 100%; margin-top: 5px;" onchange="select_l3(this)" id="level3">
+                <option value="-1"> </option>
+            </select>
+            <select class="boxstyle" style="width: 100%; margin-top: 5px;" onchange="select_l4(this)" id="level4">
+                <option value="-1"> </option>
+            </select>
+            <select class="boxstyle" style="width: 100%; margin-top: 5px;" onchange="select_l5(this)" id="level5">
+                <option value="-1"> </option>
+            </select>
+        </div>
+    </div>
+    <hr>
+</div>
+</div>
+    <!--==============================================================================================-->
+</body>
+</html>
+
+)=====";
+#endif /* INDEX_H_ */

lib/ESP32-audioI2S/examples/DLNA/src/main.cpp

@@ -0,0 +1,189 @@
+#include <Arduino.h>
+#include <WiFi.h>
+#include "websrv.h"
+#include "index.h"
+#include "Audio.h"
+#include "SoapESP32.h"
+#include "Arduino_JSON.h"
+#include <vector>
+
+using namespace std;
+
+#define I2S_DOUT      25
+#define I2S_BCLK      27
+#define I2S_LRC       26
+
+
+char SSID[] = "xxxxx";
+char PASS[] = "xxxxx";
+
+
+
+WebSrv     webSrv;
+WiFiClient client;
+WiFiUDP    udp;
+SoapESP32  soap(&client, &udp);
+Audio audio;
+
+uint numServers = 0;
+int  currentServer = -1;
+uint32_t media_downloadPort = 0;
+String media_downloadIP = "";
+vector<String> names{};
+//----------------------------------------------------------------------------------------------------------------------
+int DLNA_setCurrentServer(String serverName){
+    int serverNum = -1;
+    for(int i = 0; i < names.size(); i++){
+        if(names[i] == serverName) serverNum = i;
+    }
+    currentServer = serverNum;
+    return serverNum;
+}
+void DLNA_showServer(){ // Show connection details of all discovered, usable media servers
+    String msg = "DLNA_Names=";
+    soapServer_t srv;
+    names.clear();
+    for(int i = 0; i < numServers; i++){
+        soap.getServerInfo(i, &srv);
+        Serial.printf("Server[%d]: IP address: %s port: %d name: %s -> controlURL: %s\n",
+           i, srv.ip.toString().c_str(), srv.port, srv.friendlyName.c_str(), srv.controlURL.c_str());
+        msg += srv.friendlyName;
+        if(i < numServers - 1) msg += ',';
+        names.push_back(srv.friendlyName);
+    }
+    log_i("msg %s", msg.c_str());
+    webSrv.send(msg);
+}
+void DLNA_browseServer(String objectId, uint8_t level){
+    JSONVar myObject;
+    soapObjectVect_t browseResult;
+    soapObject_t object;
+
+    // Here the user selects the DLNA server whose content he wants to see, level 0 is root
+    if(level == 0){
+        if(DLNA_setCurrentServer(objectId) < 0) {log_e("DLNA Server not found"); return;}
+        objectId = "0";
+    }
+
+    soap.browseServer(currentServer, objectId.c_str(), &browseResult);
+    if(browseResult.size() == 0){
+        log_i("no content!"); // then the directory is empty
+        return;
+    }
+    log_v("objectID: %s", objectId.c_str());
+    for (int i = 0; i < browseResult.size(); i++){
+        object = browseResult[i];
+        myObject[i]["name"]= object.name;
+        myObject[i]["isDir"] = object.isDirectory;
+        if(object.isDirectory){
+            myObject[i]["id"]  = object.id;
+        }
+        else {
+            myObject[i]["id"]  = object.uri;
+            media_downloadPort = object.downloadPort;
+            media_downloadIP   = object.downloadIp.toString();
+        }
+        myObject[i]["size"] = (uint32_t)object.size;
+        myObject[i]["uri"]  = object.id;
+        log_v("objectName %s", browseResult[i].name.c_str());
+        log_v("objectId %s", browseResult[i].artist.c_str());
+    }
+    level++;
+    String msg = "Level" + String(level,10) + "=" + JSON.stringify(myObject);
+
+    log_v("msg = %s", msg.c_str());
+    webSrv.send(msg);
+    browseResult.clear();
+}
+
+void DLNA_getFileItems(String uri){
+    soapObjectVect_t browseResult;
+
+    log_v("uri: %s", uri.c_str());
+    log_v("downloadIP: %s", media_downloadIP.c_str());
+    log_v("downloadport: %d", media_downloadPort);
+    String URL = "http://" + media_downloadIP + ":" + media_downloadPort + "/" + uri;
+    log_i("URL=%s", URL.c_str());
+    audio.connecttohost(URL.c_str());
+}
+void DLNA_showContent(String objectId, uint8_t level){
+    log_v("obkId=%s", objectId.c_str());
+    if(level == 0){
+        DLNA_browseServer(objectId, level);
+    }
+    if(objectId.startsWith("D=")) {
+        objectId = objectId.substring(2);
+        DLNA_browseServer(objectId, level);
+    }
+    if(objectId.startsWith("F=")) {
+        objectId = objectId.substring(2);
+        DLNA_getFileItems(objectId);
+    }
+}
+
+//----------------------------------------------------------------------------------------------------------------------
+//                                      S E T U P
+//----------------------------------------------------------------------------------------------------------------------
+void setup() {
+    Serial.begin(115200);
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(SSID, PASS);
+    while (WiFi.status() != WL_CONNECTED) delay(1500);
+    log_i("connected, IP=%s", WiFi.localIP().toString().c_str());
+    webSrv.begin(80, 81); // HTTP port, WebSocket port
+
+    soap.seekServer();
+    numServers = soap.getServerCount();
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(21); // 0...21
+}
+
+//----------------------------------------------------------------------------------------------------------------------
+//                                      L O O P
+//----------------------------------------------------------------------------------------------------------------------
+void loop() {
+    vTaskDelay(1);
+    if(webSrv.loop()) return; // if true: ignore all other for faster response to web
+    audio.loop();
+}
+//----------------------------------------------------------------------------------------------------------------------
+//                                    E V E N T S
+//----------------------------------------------------------------------------------------------------------------------
+void WEBSRV_onCommand(const String cmd, const String param, const String arg){  // called from html
+    log_d("WS_onCmd:  cmd=\"%s\", params=\"%s\", arg=\"%s\"", cmd.c_str(),param.c_str(), arg.c_str());
+    if(cmd == "index.html"){ webSrv.show(index_html); return;}
+    if(cmd == "ping"){webSrv.send("pong"); return;}
+    if(cmd == "favicon.ico") return;
+    if(cmd == "DLNA_getServer")  {DLNA_showServer(); return;}
+    if(cmd == "DLNA_getContent0"){DLNA_showContent(param, 0); return;}
+    if(cmd == "DLNA_getContent1"){DLNA_showContent(param, 1); return;} // search for level 1 content
+    if(cmd == "DLNA_getContent2"){DLNA_showContent(param, 2); return;} // search for level 2 content
+    if(cmd == "DLNA_getContent3"){DLNA_showContent(param, 3); return;} // search for level 3 content
+    if(cmd == "DLNA_getContent4"){DLNA_showContent(param, 4); return;} // search for level 4 content
+    if(cmd == "DLNA_getContent5"){DLNA_showContent(param, 5); return;} // search for level 5 content
+    log_e("unknown HTMLcommand %s, param=%s", cmd.c_str(), param.c_str());
+}
+void WEBSRV_onRequest(const String request, uint32_t contentLength){
+    log_d("WS_onReq: %s contentLength %d", request.c_str(), contentLength);
+    if(request.startsWith("------")) return;      // uninteresting WebKitFormBoundaryString
+    if(request.indexOf("form-data") > 0) return;  // uninteresting Info
+    log_e("unknown request: %s",request.c_str());
+}
+void WEBSRV_onInfo(const char* info){
+    log_v("HTML_info:   %s", info);    // infos for debug
+}
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_stream(const char* info){ // The webstream comes to an end
+    Serial.print("end of stream:      ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}

lib/ESP32-audioI2S/examples/DLNA/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html

lib/ESP32-audioI2S/examples/ES8311/es8311.cpp

@@ -0,0 +1,316 @@
+/*
+	ES8311 - An ES8311 Codec driver library for Arduino
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+	examples:
+
+	//one I2C bus: (default behaviour)
+	ES8311 es;
+	es.begin(sda, scl);
+
+	//two I2C busses:
+	TwoWire i2cBusOne = TwoWire(0);
+	TwoWire i2cBusTwo = TwoWire(1);
+    ES8311 es(&i2cBusOne);
+
+    i2cBusOne.begin(sda, scl, 400000);
+*/
+
+#include "es8311.h"
+
+/* codec hifi mclk clock divider coefficients */
+static const struct _coeff_div coeff_div[] = {
+    /*!<mclk     rate   pre_div  mult  adc_div dac_div fs_mode lrch  lrcl  bckdiv osr */
+    /* 8k */
+    {12288000, 8000, 0x06, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {18432000, 8000, 0x03, 0x01, 0x03, 0x03, 0x00, 0x05, 0xff, 0x18, 0x10, 0x10},
+    {16384000, 8000, 0x08, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {8192000, 8000, 0x04, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {6144000, 8000, 0x03, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {4096000, 8000, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {3072000, 8000, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {2048000, 8000, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1536000, 8000, 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1024000, 8000, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 11.025k */
+    {11289600, 11025, 0x04, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {5644800, 11025, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {2822400, 11025, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1411200, 11025, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 12k */
+    {12288000, 12000, 0x04, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {6144000, 12000, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {3072000, 12000, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1536000, 12000, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 16k */
+    {12288000, 16000, 0x03, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {18432000, 16000, 0x03, 0x01, 0x03, 0x03, 0x00, 0x02, 0xff, 0x0c, 0x10, 0x10},
+    {16384000, 16000, 0x04, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {8192000, 16000, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {6144000, 16000, 0x03, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {4096000, 16000, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {3072000, 16000, 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {2048000, 16000, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1536000, 16000, 0x03, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1024000, 16000, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 22.05k */
+    {11289600, 22050, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {5644800, 22050, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {2822400, 22050, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1411200, 22050, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {705600, 22050, 0x01, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 24k */
+    {12288000, 24000, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {18432000, 24000, 0x03, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {6144000, 24000, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {3072000, 24000, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1536000, 24000, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 32k */
+    {12288000, 32000, 0x03, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {18432000, 32000, 0x03, 0x02, 0x03, 0x03, 0x00, 0x02, 0xff, 0x0c, 0x10, 0x10},
+    {16384000, 32000, 0x02, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {8192000, 32000, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {6144000, 32000, 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {4096000, 32000, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {3072000, 32000, 0x03, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {2048000, 32000, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1536000, 32000, 0x03, 0x03, 0x01, 0x01, 0x01, 0x00, 0x7f, 0x02, 0x10, 0x10},
+    {1024000, 32000, 0x01, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 44.1k */
+    {11289600, 44100, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {5644800, 44100, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {2822400, 44100, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1411200, 44100, 0x01, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 48k */
+    {12288000, 48000, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {18432000, 48000, 0x03, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {6144000, 48000, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {3072000, 48000, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1536000, 48000, 0x01, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+
+    /* 64k */
+    {12288000, 64000, 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {18432000, 64000, 0x03, 0x02, 0x03, 0x03, 0x01, 0x01, 0x7f, 0x06, 0x10, 0x10},
+    {16384000, 64000, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {8192000, 64000, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {6144000, 64000, 0x01, 0x02, 0x03, 0x03, 0x01, 0x01, 0x7f, 0x06, 0x10, 0x10},
+    {4096000, 64000, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {3072000, 64000, 0x01, 0x03, 0x03, 0x03, 0x01, 0x01, 0x7f, 0x06, 0x10, 0x10},
+    {2048000, 64000, 0x01, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1536000, 64000, 0x01, 0x03, 0x01, 0x01, 0x01, 0x00, 0xbf, 0x03, 0x18, 0x18},
+    {1024000, 64000, 0x01, 0x03, 0x01, 0x01, 0x01, 0x00, 0x7f, 0x02, 0x10, 0x10},
+
+    /* 88.2k */
+    {11289600, 88200, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {5644800, 88200, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {2822400, 88200, 0x01, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1411200, 88200, 0x01, 0x03, 0x01, 0x01, 0x01, 0x00, 0x7f, 0x02, 0x10, 0x10},
+
+    /* 96k */
+    {12288000, 96000, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {18432000, 96000, 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {6144000, 96000, 0x01, 0x02, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {3072000, 96000, 0x01, 0x03, 0x01, 0x01, 0x00, 0x00, 0xff, 0x04, 0x10, 0x10},
+    {1536000, 96000, 0x01, 0x03, 0x01, 0x01, 0x01, 0x00, 0x7f, 0x02, 0x10, 0x10},
+};
+
+ES8311::ES8311(TwoWire *TwoWireInstance){
+    _TwoWireInstance = TwoWireInstance;
+}
+
+ES8311::~ES8311(){
+    if (_TwoWireInstance != NULL) {
+        _TwoWireInstance->end();
+    }
+}
+
+/*
+* look for the coefficient in coeff_div[] table
+*/
+int ES8311::get_coeff(uint32_t mclk, uint32_t rate){
+    for (int i = 0; i < (sizeof(coeff_div) / sizeof(coeff_div[0])); i++) {
+        if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+bool ES8311::begin(int32_t sda, int32_t scl, uint32_t frequency) {
+    bool ok = true;
+    uint8_t reg = 0;
+
+    if((sda >= 0) && (scl >= 0)){
+	    ok = _TwoWireInstance->begin(sda, scl, frequency);
+        _TwoWireInstance->beginTransmission(ES8311_ADDR);
+        ok = (Wire.endTransmission() == 0);
+        if(!ok) {
+            _TwoWireInstance->end();
+            log_e("ES8311 not found"); return false;
+        }
+    }
+    else {
+        log_e("Invalid SDA/SCL pins");
+        return false;
+    }
+
+    ok |= WriteReg(0x00, 0x1F);  // Reset
+    vTaskDelay(20 / portTICK_PERIOD_MS);
+    ok |= WriteReg(0x00, 0x00);  // Release reset
+    ok |= WriteReg(0x00, 0x80);  // Power on
+
+    ok |= WriteReg(0x01, 0x3F);  // Enable all clocks
+
+    reg = ReadReg(0x06);
+    reg &= ~BIT(5); // SCLK (BCLK) pin not inverted
+    ok |= WriteReg(0x06, reg);   //
+
+    ok |= setSampleRate(ES8311_SAMPLE_RATE48);         // default
+    ok |= setBitsPerSample(ES8311_BITS_PER_SAMPLE16);  // default
+
+    ok |= WriteReg(0x0D, 0x01); // Power up analog circuitry
+    ok |= WriteReg(0x0E, 0x02); // Enable analog PGA, enable ADC modulator
+    ok |= WriteReg(0x12, 0x00); // Power-up DAC
+    ok |= WriteReg(0x13, 0x10); // Enable output to HP drive
+    ok |= WriteReg(0x1C, 0x6A); // ADC Equalizer bypass, cancel DC offset in digital domain
+    ok |= WriteReg(0x37, 0x08); // Bypass DAC equalizer
+
+    return ok;
+}
+
+bool ES8311::setVolume(uint8_t volume){ // 0...100
+    if (volume > 100) {volume = 100;}
+    int reg32;
+    if (volume == 0) {reg32 = 0;}
+    else {            reg32 = ((volume) * 256 / 100) - 1;}
+    return WriteReg(0x32, reg32);
+}
+
+uint8_t ES8311::getVolume(){
+    uint8_t reg32 = ReadReg(0x32);
+    uint8_t volume;
+    if (reg32 == 0) {
+        volume = 0;
+    } else {
+        volume = ((reg32 * 100) / 256) + 1;
+    }
+    return volume;
+}
+
+bool ES8311::setSampleRate(uint32_t sample_rate){
+    uint8_t reg = 0;
+    bool ok = true;
+    _mclk_hz = sample_rate * 256; // default MCLK frequency
+    if(sample_rate > 64000) _mclk_hz /= 2;
+    int coeff = get_coeff(_mclk_hz, sample_rate);
+    if (coeff < 0) {log_e("Invalid sample rate %i", sample_rate); return false;}
+    const struct _coeff_div *const selected_coeff = &coeff_div[coeff];
+    reg = ReadReg(0x02);
+    reg |= (selected_coeff->pre_div - 1) << 5;
+    reg |= selected_coeff->pre_multi << 3;
+    ok |= WriteReg(0x02, reg); // Set pre_div and pre_multi
+    const uint8_t reg03 = (selected_coeff->fs_mode << 6) | selected_coeff->adc_osr;
+    ok |= WriteReg(0x03, reg03); // Set fs_mode and adc_osr
+    ok |= WriteReg(0x04, selected_coeff->dac_osr); // Set dac_osr
+    const uint8_t reg05 = ((selected_coeff->adc_div - 1) << 4) | (selected_coeff->dac_div - 1);
+    ok |= WriteReg(0x05, reg05); // Set adc_div and dac_div
+    reg = ReadReg(0x06);
+    reg &= 0xE0;
+    if (selected_coeff->bclk_div < 19) {reg |= (selected_coeff->bclk_div - 1) << 0;}
+    else {                              reg |= (selected_coeff->bclk_div) << 0;}
+    ok |= WriteReg(0x06, reg); // Set bclk_div
+    reg = ReadReg(0x07);
+    reg &= 0xC0;
+    reg |= selected_coeff->lrck_h << 0;
+    ok |= WriteReg(0x07, reg); // Set lrck_h
+    ok |= WriteReg(0x08, selected_coeff->lrck_l); // Set lrck_l
+    return ok;
+}
+
+bool ES8311::setBitsPerSample(uint8_t bps){
+    uint8_t reg09 = ReadReg(0x09);
+    uint8_t reg0A = ReadReg(0x0A);
+    switch (bps) {
+        case 16: reg09 |= (3 << 2); reg0A |= (3 << 2); break;
+        case 18: reg09 |= (2 << 2); reg0A |= (2 << 2); break;
+        case 20: reg09 |= (1 << 2); reg0A |= (1 << 2); break;
+        case 24: reg09 |= (0 << 2); reg0A |= (0 << 2); break;
+        case 32: reg09 |= (4 << 2); reg0A |= (4 << 2); break;
+        default: return false; // Invalid bits per sample
+    }
+    bool ok = WriteReg(0x09, reg09);
+    ok |= WriteReg(0x0A, reg0A);
+    return ok;
+}
+
+bool ES8311::enableMicrophone(bool enable){
+    uint8_t reg = 0x1A; // enable analog MIC and max PGA gain
+    if (enable) {
+        reg |= BIT(6);
+    }
+    bool ok = WriteReg(0x17, 0xC8); // ADC_VOLUME
+    ok |= WriteReg(0x14, reg); // Enable MIC
+    return ok;
+}
+
+bool ES8311::setMicrophoneGain(uint8_t gain){ // 0...7
+    uint8_t reg = ReadReg(0x16);
+    reg &= 0xF8; // Clear gain bits
+    if (gain > 7) {gain = 7;}
+    reg |= gain; // Set gain bits
+    bool ok = WriteReg(0x16, gain); // ADC_VOLUME
+    return ok;
+}
+
+uint8_t ES8311::getMicrophoneGain(){
+    uint8_t reg = ReadReg(0x16);
+    return (reg & 0x07); // Get gain bits
+}
+
+bool ES8311::WriteReg(uint8_t reg, uint8_t val){
+	_TwoWireInstance->beginTransmission(ES8311_ADDR);
+	_TwoWireInstance->write(reg);
+	_TwoWireInstance->write(val);
+	return _TwoWireInstance->endTransmission() == 0;
+}
+
+uint8_t ES8311::ReadReg(uint8_t reg){
+	_TwoWireInstance->beginTransmission(ES8311_ADDR);
+	_TwoWireInstance->write(reg);
+	_TwoWireInstance->endTransmission(false);
+
+	uint8_t val = 0u;
+	_TwoWireInstance->requestFrom(uint16_t(ES8311_ADDR), (uint8_t)1, true);
+	if(_TwoWireInstance->available() >= 1){
+        val = _TwoWireInstance->read();
+	}
+    _TwoWireInstance->endTransmission();
+	return val;
+}
+
+void ES8311::read_all(){
+    for (uint8_t i = 0; i < 0x4A; i++) {
+        Serial.printf("0x%02X: 0x%02X\n", i, ReadReg(i));
+    }
+}
+

lib/ESP32-audioI2S/examples/ES8311/es8311.h

@@ -0,0 +1,48 @@
+#pragma once
+#include <Arduino.h>
+#include <Wire.h>
+
+
+#define ES8311_ADDR              0x18
+#define ES8311_SAMPLE_RATE48     48000
+#define ES8311_BITS_PER_SAMPLE16 16
+
+struct _coeff_div {       /* Clock coefficient structure */
+    uint32_t mclk;        /* mclk frequency */
+    uint32_t rate;        /* sample rate */
+    uint8_t pre_div;      /* the pre divider with range from 1 to 8 */
+    uint8_t pre_multi;    /* the pre multiplier with 0: 1x, 1: 2x, 2: 4x, 3: 8x selection */
+    uint8_t adc_div;      /* adcclk divider */
+    uint8_t dac_div;      /* dacclk divider */
+    uint8_t fs_mode;      /* double speed or single speed, =0, ss, =1, ds */
+    uint8_t lrck_h;       /* adclrck divider and daclrck divider */
+    uint8_t lrck_l;
+    uint8_t bclk_div;     /* sclk divider */
+    uint8_t adc_osr;      /* adc osr */
+    uint8_t dac_osr;      /* dac osr */
+};
+
+class ES8311{
+
+private:
+    TwoWire *_TwoWireInstance = NULL;	// TwoWire Instance
+    uint32_t _mclk_hz = 48000 * 256; // default MCLK frequency
+public:
+	// Constructor.
+    ES8311(TwoWire  *TwoWireInstance = &Wire);
+    ~ES8311();
+    bool begin(int32_t sda, int32_t scl, uint32_t frequency);
+    bool setVolume(uint8_t volume);
+    uint8_t getVolume();
+    bool setSampleRate(uint32_t sample_rate);
+    bool setBitsPerSample(uint8_t bps);
+    bool enableMicrophone(bool enable);
+    bool setMicrophoneGain(uint8_t gain);
+    uint8_t getMicrophoneGain();
+    void read_all();
+protected:
+    int get_coeff(uint32_t mclk, uint32_t rate);
+	bool WriteReg(uint8_t reg, uint8_t val);
+	uint8_t ReadReg(uint8_t reg);
+};
+

lib/ESP32-audioI2S/examples/ES8311/main.cpp

@@ -0,0 +1,62 @@
+#include "Arduino.h"
+#include "Audio.h"
+#include "WiFi.h"
+#include "es8311.h"
+#include "Wire.h"
+
+#define I2S_DOUT       9
+#define I2S_BCLK      12
+#define I2S_MCLK      13
+#define I2S_LRC       10
+#define I2C_SCL        8
+#define I2C_SDA        7
+#define PA_ENABLE     53
+
+Audio audio;
+ES8311 es;
+
+String ssid =     "*****";
+String password = "*****";
+
+
+void setup() {
+    Serial.begin(115200);
+    Serial.print("\n\n");
+    Serial.println("----------------------------------");
+    Serial.printf("ESP32 Chip: %s\n", ESP.getChipModel());
+    Serial.printf("Arduino Version: %d.%d.%d\n", ESP_ARDUINO_VERSION_MAJOR, ESP_ARDUINO_VERSION_MINOR, ESP_ARDUINO_VERSION_PATCH);
+    Serial.printf("ESP-IDF Version: %d.%d.%d\n", ESP_IDF_VERSION_MAJOR, ESP_IDF_VERSION_MINOR, ESP_IDF_VERSION_PATCH);
+    Serial.printf("ARDUINO_LOOP_STACK_SIZE %d words (32 bit)\n", CONFIG_ARDUINO_LOOP_STACK_SIZE);
+    Serial.println("----------------------------------");
+    Serial.print("\n\n");
+
+    WiFi.begin(ssid.c_str(), password.c_str());
+     while (WiFi.status() != WL_CONNECTED) {delay(1500); Serial.print(".");}
+
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT, I2S_MCLK);
+    audio.setVolume(21); // default 0...21
+
+    pinMode(PA_ENABLE, OUTPUT);
+    digitalWrite(PA_ENABLE, HIGH);
+
+    if(!es.begin(I2C_SDA, I2C_SCL, 400000)) log_e("ES8311 begin failed");
+    es.setVolume(50);
+    es.setBitsPerSample(16);
+
+    //    es.setSampleRate(22050);
+    //    es.read_all();
+    //    audio.connecttohost("http://www.wdr.de/wdrlive/media/einslive.m3u");
+   audio.connecttohost("http://stream.antennethueringen.de/live/aac-64/stream.antennethueringen.de/"); // aac
+
+}
+
+void loop() {
+    audio.loop();
+    vTaskDelay(1);
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+

lib/ESP32-audioI2S/examples/ES8388/ES8388.cpp

@@ -0,0 +1,270 @@
+#include <Arduino.h>
+#include "ES8388.h"
+#include <Wire.h>
+
+#define ES8388_ADDR 0x10
+
+/* ES8388 register */
+#define ES8388_CONTROL1 0x00
+#define ES8388_CONTROL2 0x01
+#define ES8388_CHIPPOWER 0x02
+#define ES8388_ADCPOWER 0x03
+#define ES8388_DACPOWER 0x04
+#define ES8388_CHIPLOPOW1 0x05
+#define ES8388_CHIPLOPOW2 0x06
+#define ES8388_ANAVOLMANAG 0x07
+#define ES8388_MASTERMODE 0x08
+
+/* ADC */
+#define ES8388_ADCCONTROL1 0x09
+#define ES8388_ADCCONTROL2 0x0a
+#define ES8388_ADCCONTROL3 0x0b
+#define ES8388_ADCCONTROL4 0x0c
+#define ES8388_ADCCONTROL5 0x0d
+#define ES8388_ADCCONTROL6 0x0e
+#define ES8388_ADCCONTROL7 0x0f
+#define ES8388_ADCCONTROL8 0x10
+#define ES8388_ADCCONTROL9 0x11
+#define ES8388_ADCCONTROL10 0x12
+#define ES8388_ADCCONTROL11 0x13
+#define ES8388_ADCCONTROL12 0x14
+#define ES8388_ADCCONTROL13 0x15
+#define ES8388_ADCCONTROL14 0x16
+
+/* DAC */
+#define ES8388_DACCONTROL1 0x17
+#define ES8388_DACCONTROL2 0x18
+#define ES8388_DACCONTROL3 0x19
+#define ES8388_DACCONTROL4 0x1a
+#define ES8388_DACCONTROL5 0x1b
+#define ES8388_DACCONTROL6 0x1c
+#define ES8388_DACCONTROL7 0x1d
+#define ES8388_DACCONTROL8 0x1e
+#define ES8388_DACCONTROL9 0x1f
+#define ES8388_DACCONTROL10 0x20
+#define ES8388_DACCONTROL11 0x21
+#define ES8388_DACCONTROL12 0x22
+#define ES8388_DACCONTROL13 0x23
+#define ES8388_DACCONTROL14 0x24
+#define ES8388_DACCONTROL15 0x25
+#define ES8388_DACCONTROL16 0x26
+#define ES8388_DACCONTROL17 0x27
+#define ES8388_DACCONTROL18 0x28
+#define ES8388_DACCONTROL19 0x29
+#define ES8388_DACCONTROL20 0x2a
+#define ES8388_DACCONTROL21 0x2b
+#define ES8388_DACCONTROL22 0x2c
+#define ES8388_DACCONTROL23 0x2d
+#define ES8388_DACCONTROL24 0x2e
+#define ES8388_DACCONTROL25 0x2f
+#define ES8388_DACCONTROL26 0x30
+#define ES8388_DACCONTROL27 0x31
+#define ES8388_DACCONTROL28 0x32
+#define ES8388_DACCONTROL29 0x33
+#define ES8388_DACCONTROL30 0x34
+
+bool ES8388::write_reg(uint8_t slave_add, uint8_t reg_add, uint8_t data)
+{
+    Wire.beginTransmission(slave_add);
+    Wire.write(reg_add);
+    Wire.write(data);
+    return Wire.endTransmission() == 0;
+}
+
+bool ES8388::read_reg(uint8_t slave_add, uint8_t reg_add, uint8_t &data)
+{
+    bool retval = false;
+    Wire.beginTransmission(slave_add);
+    Wire.write(reg_add);
+    Wire.endTransmission(false);
+    Wire.requestFrom((uint16_t)slave_add, (uint8_t)1, true);
+    if (Wire.available() >= 1)
+    {
+        data = Wire.read();
+        retval = true;
+    }
+    return retval;
+}
+
+bool ES8388::begin(int32_t sda, int32_t scl, uint32_t frequency)
+{
+    bool res = identify(sda, scl, frequency);
+
+    if (res == true)
+    {
+
+        /* mute DAC during setup, power up all systems, slave mode */
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL3, 0x04);
+        res &= write_reg(ES8388_ADDR, ES8388_CONTROL2, 0x50);
+        res &= write_reg(ES8388_ADDR, ES8388_CHIPPOWER, 0x00);
+        res &= write_reg(ES8388_ADDR, ES8388_MASTERMODE, 0x00);
+
+        /* power up DAC and enable LOUT1+2 / ROUT1+2, ADC sample rate = DAC sample rate */
+        res &= write_reg(ES8388_ADDR, ES8388_DACPOWER, 0x3e);
+        res &= write_reg(ES8388_ADDR, ES8388_CONTROL1, 0x12);
+
+        /* DAC I2S setup: 16 bit word length, I2S format; MCLK / Fs = 256*/
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL1, 0x18);
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL2, 0x02);
+
+        /* DAC to output route mixer configuration: ADC MIX TO OUTPUT */
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL16, 0x1B);
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL17, 0x90);
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL20, 0x90);
+
+        /* DAC and ADC use same LRCK, enable MCLK input; output resistance setup */
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL21, 0x80);
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL23, 0x00);
+
+        /* DAC volume control: 0dB (maximum, unattenuated)  */
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL5, 0x00);
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL4, 0x00);
+
+        /* power down ADC while configuring; volume: +9dB for both channels */
+        res &= write_reg(ES8388_ADDR, ES8388_ADCPOWER, 0xff);
+        res &= write_reg(ES8388_ADDR, ES8388_ADCCONTROL1, 0x88); // +24db
+
+        /* select LINPUT2 / RINPUT2 as ADC input; stereo; 16 bit word length, format right-justified, MCLK / Fs = 256 */
+        res &= write_reg(ES8388_ADDR, ES8388_ADCCONTROL2, 0xf0); // 50
+        res &= write_reg(ES8388_ADDR, ES8388_ADCCONTROL3, 0x80); // 00
+        res &= write_reg(ES8388_ADDR, ES8388_ADCCONTROL4, 0x0e);
+        res &= write_reg(ES8388_ADDR, ES8388_ADCCONTROL5, 0x02);
+
+        /* set ADC volume */
+        res &= write_reg(ES8388_ADDR, ES8388_ADCCONTROL8, 0x20);
+        res &= write_reg(ES8388_ADDR, ES8388_ADCCONTROL9, 0x20);
+
+        /* set LOUT1 / ROUT1 volume: 0dB (unattenuated) */
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL24, 0x1e);
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL25, 0x1e);
+
+        /* set LOUT2 / ROUT2 volume: 0dB (unattenuated) */
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL26, 0x1e);
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL27, 0x1e);
+
+        /* power up and enable DAC; power up ADC (no MIC bias) */
+        res &= write_reg(ES8388_ADDR, ES8388_DACPOWER, 0x3c);
+        res &= write_reg(ES8388_ADDR, ES8388_DACCONTROL3, 0x00);
+        res &= write_reg(ES8388_ADDR, ES8388_ADCPOWER, 0x00);
+
+        /* set up MCLK) */
+        #ifdef FUNC_GPIO0_CLK_OUT1
+		    PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0_CLK_OUT1);
+        #endif
+        WRITE_PERI_REG(PIN_CTRL, 0xFFF0);
+    }
+    return res;
+}
+
+/**
+ * @brief (un)mute one of the two outputs or main dac output of the ES8388 by switching of the output register bits. Does not really mute the selected output, causes an attenuation. 
+ * hence should be used in conjunction with appropriate volume setting. Main dac output mute does mute both outputs
+ * 
+ * @param out
+ * @param muted
+ */
+void ES8388::mute(const ES8388_OUT out, const bool muted)
+{
+    uint8_t reg_addr;
+    uint8_t mask_mute;
+    uint8_t mask_val;
+
+    switch (out)
+    {
+    case ES_OUT1:
+        reg_addr = ES8388_DACPOWER;
+        mask_mute = (3 << 4);
+        mask_val = muted ? 0 : mask_mute;
+        break;
+    case ES_OUT2:
+        reg_addr = ES8388_DACPOWER;
+        mask_mute = (3 << 2);
+        mask_val = muted ? 0 : mask_mute;
+        break;
+    case ES_MAIN:
+    default:
+        reg_addr = ES8388_DACCONTROL3;
+        mask_mute = 1 << 2;
+        mask_val = muted ? mask_mute : 0;
+        break;
+    }
+
+    uint8_t reg;
+    if (read_reg(ES8388_ADDR, reg_addr, reg))
+    {
+        reg = (reg & ~mask_mute) | (mask_val & mask_mute);
+        write_reg(ES8388_ADDR, reg_addr, reg);
+    }
+}
+
+/**
+ * @brief Set volume gain for the main dac, or for one of the two output channels. Final gain = main gain + out channel gain 
+ * 
+ * @param out which gain setting to control
+ * @param vol 0-100 (100 is max)
+ */
+void ES8388::volume(const ES8388_OUT out, const uint8_t vol)
+{
+    const uint32_t max_vol = 100; // max input volume value
+
+    const int32_t max_vol_val = out == ES8388_OUT::ES_MAIN ? 96 : 0x21; // max register value for ES8388 out volume
+
+    uint8_t lreg = 0, rreg = 0;
+
+    switch (out)
+    {
+    case ES_MAIN:
+        lreg = ES8388_DACCONTROL4;
+        rreg = ES8388_DACCONTROL5;
+        break;
+    case ES_OUT1:
+        lreg = ES8388_DACCONTROL24;
+        rreg = ES8388_DACCONTROL25;
+        break;
+    case ES_OUT2:
+        lreg = ES8388_DACCONTROL26;
+        rreg = ES8388_DACCONTROL27;
+        break;
+    }
+
+    uint8_t vol_val = vol > max_vol ? max_vol_val : (max_vol_val * vol) / max_vol;
+
+    // main dac volume control is reverse scale (lowest value is loudest)
+    // hence we reverse the calculated value
+    if (out == ES_MAIN)
+    {
+        vol_val = max_vol_val - vol_val;
+    }
+
+    write_reg(ES8388_ADDR, lreg, vol_val);
+    write_reg(ES8388_ADDR, rreg, vol_val);
+}
+
+void ES8388::SetVolumeSpeaker(uint8_t vol) {
+    vol = vol * 1.6;
+    volume(ES_OUT1, vol);
+    volume(ES_MAIN, 100);
+}
+
+void ES8388::SetVolumeHeadphone(uint8_t vol){
+    vol = vol * 1.6;
+    volume(ES_OUT2, vol);
+    volume(ES_MAIN, 100);    
+}
+
+/**
+ * @brief Test if device with I2C address for ES8388 is connected to the I2C bus 
+ * 
+ * @param sda which pin to use for I2C SDA
+ * @param scl which pin to use for I2C SCL
+ * @param frequency which frequency to use as I2C bus frequency
+ * @return true device was found
+ * @return false device was not found
+ */
+bool ES8388::identify(int32_t sda, int32_t scl, uint32_t frequency)
+{
+    Wire.begin(sda, scl, frequency);
+    Wire.beginTransmission(ES8388_ADDR);
+    return Wire.endTransmission() == 0;
+}
+

lib/ESP32-audioI2S/examples/ES8388/ES8388.h

@@ -0,0 +1,27 @@
+#pragma once
+#include <stdint.h>
+
+class ES8388
+{
+
+    bool write_reg(uint8_t slave_add, uint8_t reg_add, uint8_t data);
+    bool read_reg(uint8_t slave_add, uint8_t reg_add, uint8_t &data);
+    bool identify(int32_t sda, int32_t scl, uint32_t frequency);
+
+public:
+    bool begin(int32_t sda = -1, int32_t scl = -1, uint32_t frequency = 400000U);
+
+    enum ES8388_OUT
+    {
+        ES_MAIN, // this is the DAC output volume (both outputs)
+        ES_OUT1, // this is the additional gain for OUT1
+        ES_OUT2  // this is the additional gain for OUT2
+    };
+
+    void SetVolumeSpeaker(uint8_t vol);
+    void SetVolumeHeadphone(uint8_t vol);
+
+    void mute(const ES8388_OUT out, const bool muted);
+    void volume(const ES8388_OUT out, const uint8_t vol);
+};
+

lib/ESP32-audioI2S/examples/ES8388/main.cpp

@@ -0,0 +1,139 @@
+#include "Arduino.h"
+#include "WiFi.h"
+#include "SPI.h"
+#include "SD.h"
+#include "FS.h"
+#include "Wire.h"
+#include "ES8388.h"
+#include "Audio.h"
+
+
+// SPI GPIOs
+#define SD_CS         13
+#define SPI_MOSI      15
+#define SPI_MISO       2
+#define SPI_SCK       14
+
+// I2S GPIOs, the names refer on ES8388, AS1 Audio Kit V2.2 3378
+#define I2S_DSIN    35 // pin not used
+#define I2S_BCLK    27
+#define I2S_LRC     25
+#define I2S_MCLK     0
+#define I2S_DOUT    26
+
+// I2C GPIOs
+#define IIC_CLK       32
+#define IIC_DATA      33
+
+// buttons
+// #define BUTTON_2_PIN 13             // shared mit SPI_CS
+#define BUTTON_3_PIN  19
+#define BUTTON_4_PIN  23
+#define BUTTON_5_PIN  18               // Stop
+#define BUTTON_6_PIN   5               // Play
+
+// amplifier enable
+#define GPIO_PA_EN    21
+
+//Switch S1: 1-OFF, 2-ON, 3-ON, 4-OFF, 5-OFF
+
+String ssid =     "*****";
+String password = "*****";
+
+ES8388 dac;                                 // ES8388 (new board)
+int volume = 40;                            // 0...100
+
+Audio audio;
+
+//#####################################################################
+
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("\r\nReset");
+  Serial.printf_P(PSTR("Free mem=%l\n"), ESP.getFreeHeap());
+
+  pinMode(SD_CS, OUTPUT);
+  digitalWrite(SD_CS, HIGH);
+  SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
+  SPI.setFrequency(1000000);
+
+  SD.begin(SD_CS);
+
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid.c_str(), password.c_str());
+
+  while (WiFi.status() != WL_CONNECTED)
+  {
+    Serial.print(".");
+    delay(100);
+  }
+
+  Serial.printf_P(PSTR("Connected\r\nRSSI: "));
+  Serial.print(WiFi.RSSI());
+  Serial.print(" IP: ");
+  Serial.println(WiFi.localIP());
+
+    Serial.printf("Connect to DAC codec... ");
+    while (not dac.begin(IIC_DATA, IIC_CLK))
+    {
+        Serial.printf("Failed!\n");
+        delay(1000);
+    }
+    Serial.printf("OK\n");
+
+    dac.SetVolumeSpeaker(volume);
+    dac.SetVolumeHeadphone(volume);
+//  ac.DumpRegisters();
+
+    // Enable amplifier
+    pinMode(GPIO_PA_EN, OUTPUT);
+    digitalWrite(GPIO_PA_EN, HIGH);
+
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT, I2S_MCLK);
+    audio.setVolume(10); // 0...21
+
+    audio.connecttohost("http://mp3channels.webradio.antenne.de:80/oldies-but-goldies");
+//  audio.connecttohost("http://dg-rbb-http-dus-dtag-cdn.cast.addradio.de/rbb/antennebrandenburg/live/mp3/128/stream.mp3");
+//  audio.connecttospeech("Wenn die Hunde schlafen, kann der Wolf gut Schafe stehlen.", "de");
+
+}
+
+//-----------------------------------------------------------------------
+
+void loop(){
+    vTaskDelay(1);
+    audio.loop();
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}
+void audio_eof_speech(const char *info){
+    Serial.print("eof_speech  ");Serial.println(info);
+}

lib/ESP32-audioI2S/examples/ESP32_TTGO-TAudio/ESP32_TTGO-TAudio.ino

@@ -0,0 +1,86 @@
+// Copied from https://github.com/LilyGO/TTGO-TAudio/issues/12
+
+
+// Required Libraries (Download zips and add to the Arduino IDE library).
+#include "Arduino.h"
+#include <WM8978.h> // https://github.com/CelliesProjects/wm8978-esp32
+#include <Audio.h>  // https://github.com/schreibfaul1/ESP32-audioI2S
+
+// T-Audio 1.6 WM8978 I2C pins.
+#define I2C_SDA     19
+#define I2C_SCL     18
+
+// T-Audio 1.6 WM8978 I2S pins.
+#define I2S_BCK     33
+#define I2S_WS      25
+#define I2S_DOUT    26
+
+// T-Audio 1.6 WM8978 MCLK gpio number
+#define I2S_MCLKPIN  0
+
+Audio audio;
+WM8978 dac;
+
+void setup() {
+    Serial.begin(115200);
+
+  // Setup wm8978 I2C interface.
+  if (!dac.begin(I2C_SDA, I2C_SCL)) {
+    ESP_LOGE(TAG, "Error setting up dac: System halted.");
+    while (1) delay(100);
+  }
+
+  // Select I2S pins
+  audio.setPinout(I2S_BCK, I2S_WS, I2S_DOUT);
+  audio.i2s_mclk_pin_select(I2S_MCLKPIN);
+
+  // WiFi Settings here.
+  WiFi.begin("EnterSSIDHere", "EnterPasswordHere");
+  while (!WiFi.isConnected()) {
+    delay(10);
+  }
+  ESP_LOGI(TAG, "Connected. Starting MP3...");
+  // Enter your Icecast station URL here.
+  audio.setVolume(21);
+  audio.connecttohost("http://hestia2.cdnstream.com/1458_128");
+  // Volume control.
+  dac.setSPKvol(63); // Change volume here for board speaker output (Max 63).
+  dac.setHPvol(63, 63); // Change volume here for headphone jack left, right channel.
+}
+
+void loop() {
+    vTaskDelay(1);
+    audio.loop();
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}
+void audio_eof_speech(const char *info){
+    Serial.print("eof_speech  ");Serial.println(info);
+}

lib/ESP32-audioI2S/examples/Ethernet/ETH_IP101.ino

@@ -0,0 +1,94 @@
+#include "Arduino.h"
+#include "Audio.h"
+#include "ETH.h"
+
+#define ETHERNET_IF
+
+#ifdef CONFIG_IDF_TARGET_ESP32
+#define I2S_DOUT      25
+#define I2S_BCLK      27
+#define I2S_LRC       26
+#define ETH_PHY_TYPE  ETH_PHY_TLK110
+#define ETH_PHY_MDC   23
+#define ETH_PHY_MDIO  18
+#define ETH_PHY_POWER -1
+#define ETH_CLK_MODE  ETH_CLOCK_GPIO0_IN
+#endif
+
+#ifdef CONFIG_IDF_TARGET_ESP32P4
+#define I2S_DOUT      22
+#define I2S_BCLK      20
+#define I2S_LRC       21
+#define ETH_PHY_TYPE  ETH_PHY_TLK110
+#define ETH_PHY_MDC   31
+#define ETH_PHY_MDIO  52
+#define ETH_PHY_POWER 51
+#define ETH_CLK_MODE  EMAC_CLK_EXT_IN
+#endif
+
+Audio audio;
+
+static bool eth_connected = false;
+
+void onEvent(arduino_event_id_t event) {
+  switch (event) {
+    case ARDUINO_EVENT_ETH_START:
+      Serial.println("ETH Started");
+      // The hostname must be set after the interface is started, but needs
+      // to be set before DHCP, so set it from the event handler thread.
+      ETH.setHostname("esp32-ethernet");
+      break;
+    case ARDUINO_EVENT_ETH_CONNECTED: Serial.println("ETH Connected"); break;
+    case ARDUINO_EVENT_ETH_GOT_IP:
+      Serial.println("ETH Got IP");
+      Serial.println(ETH);
+      eth_connected = true;
+      break;
+    case ARDUINO_EVENT_ETH_LOST_IP:
+      Serial.println("ETH Lost IP");
+      eth_connected = false;
+      break;
+    case ARDUINO_EVENT_ETH_DISCONNECTED:
+      Serial.println("ETH Disconnected");
+      eth_connected = false;
+      break;
+    case ARDUINO_EVENT_ETH_STOP:
+      Serial.println("ETH Stopped");
+      eth_connected = false;
+      break;
+    default: break;
+  }
+}
+
+
+void setup() {
+    Serial.begin(115200);
+    Serial.print("A\n\n");
+    Serial.println("----------------------------------");
+    Serial.printf("ESP32 Chip: %s\n", ESP.getChipModel());
+    Serial.printf("Arduino Version: %d.%d.%d\n", ESP_ARDUINO_VERSION_MAJOR, ESP_ARDUINO_VERSION_MINOR, ESP_ARDUINO_VERSION_PATCH);
+    Serial.printf("ESP-IDF Version: %d.%d.%d\n", ESP_IDF_VERSION_MAJOR, ESP_IDF_VERSION_MINOR, ESP_IDF_VERSION_PATCH);
+    Serial.printf("ARDUINO_LOOP_STACK_SIZE %d words (32 bit)\n", CONFIG_ARDUINO_LOOP_STACK_SIZE);
+    Serial.println("----------------------------------");
+    Serial.print("\n\n");
+    Network.onEvent(onEvent);
+    ETH.begin();
+    while (!eth_connected) delay(100);
+    Serial.println("ETH Connected");
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(21); // default 0...21
+    audio.connecttohost("http://stream.antennethueringen.de/live/aac-64/stream.antennethueringen.de/"); // aac
+    pinMode(53, OUTPUT);
+    digitalWrite(53, HIGH);
+}
+
+void loop() {
+    audio.loop();
+    vTaskDelay(1);
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+

lib/ESP32-audioI2S/examples/Ethernet/ETH_W5500.ino

@@ -0,0 +1,74 @@
+#include "Arduino.h" // >= Arduino V3
+#include <ETH.h>
+#include <SPI.h>
+#define ETHERNET_IF
+#include "Audio.h"
+
+Audio audio;
+
+#define USE_TWO_ETH_PORTS 0
+#define ETH_PHY_TYPE ETH_PHY_W5500
+
+// GPIOs
+#define ETH_PHY_ADDR   1
+#define ETH_PHY_CS     3
+#define ETH_PHY_IRQ    8
+#define ETH_PHY_RST    4
+#define ETH_SPI_SCK    7
+#define ETH_SPI_MISO   6
+#define ETH_SPI_MOSI   5
+#define I2S_DOUT      12
+#define I2S_BCLK      13
+#define I2S_LRC       14
+
+static bool eth_connected = false;
+
+void onEvent(arduino_event_id_t event, arduino_event_info_t info) {
+    switch (event) {
+        case ARDUINO_EVENT_ETH_START:
+            Serial.println("ETH Started");
+            ETH.setHostname("esp32-eth0"); //set eth hostname here
+            break;
+        case ARDUINO_EVENT_ETH_CONNECTED: Serial.println("ETH Connected"); break;
+        case ARDUINO_EVENT_ETH_GOT_IP:    Serial.printf("ETH Got IP: '%s'\n", esp_netif_get_desc(info.got_ip.esp_netif)); Serial.println(ETH);
+            eth_connected = true;
+            break;
+        case ARDUINO_EVENT_ETH_LOST_IP:
+            Serial.println("ETH Lost IP");
+            eth_connected = false;
+            break;
+        case ARDUINO_EVENT_ETH_DISCONNECTED:
+            Serial.println("ETH Disconnected");
+            eth_connected = false;
+            break;
+        case ARDUINO_EVENT_ETH_STOP:
+            Serial.println("ETH Stopped");
+            eth_connected = false;
+            break;
+        default: break;
+    }
+}
+
+void setup(){
+    Serial.begin(115200);
+    Serial.print("\n\n");
+
+    Network.onEvent(onEvent);
+
+    SPI.begin(ETH_SPI_SCK, ETH_SPI_MISO, ETH_SPI_MOSI);
+    ETH.begin(ETH_PHY_TYPE, ETH_PHY_ADDR, ETH_PHY_CS, ETH_PHY_IRQ, ETH_PHY_RST, SPI);
+    while (!eth_connected) delay(100);
+
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(21); // default 0...21
+    audio.connecttohost("https://wdr-wdr2-ruhrgebiet.icecastssl.wdr.de/wdr/wdr2/ruhrgebiet/mp3/128/stream.mp3"); // mp3
+}
+
+void loop(){
+    audio.loop();
+    vTaskDelay(5 /portTICK_PERIOD_MS);
+}
+
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}

lib/ESP32-audioI2S/examples/Ethernet/WT32-ETH01.ino

@@ -0,0 +1,88 @@
+
+#include "Arduino.h"
+#include "Audio.h"
+#include "SD.h"
+#include "FS.h"
+
+// Digital I/O used
+#define SD_CS          5
+#define SPI_MOSI       2
+#define SPI_MISO       4
+#define SPI_SCK       17
+#define I2S_DOUT      12
+#define I2S_BCLK      14
+#define I2S_LRC       15
+
+#define ETHERNET_IF
+#define ETH_PHY_TYPE  ETH_PHY_LAN8720
+#define ETH_PHY_MDC   23
+#define ETH_PHY_MDIO  18
+
+#ifdef CONFIG_IDF_TARGET_ESP32
+#define ETH_CLK_MODE  ETH_CLOCK_GPIO0_IN
+#endif
+
+#ifdef CONFIG_IDF_TARGET_ESP32P4
+#define ETH_CLK_MODE  EMAC_CLK_EXT_IN
+#endif
+
+#include "ETH.h"
+
+Audio audio;
+
+static bool eth_connected = false;
+
+void onEvent(arduino_event_id_t event) {
+  switch (event) {
+    case ARDUINO_EVENT_ETH_START:
+      Serial.println("ETH Started");
+      // The hostname must be set after the interface is started, but needs
+      // to be set before DHCP, so set it from the event handler thread.
+      ETH.setHostname("esp32-ethernet");
+      break;
+    case ARDUINO_EVENT_ETH_CONNECTED: Serial.println("ETH Connected"); break;
+    case ARDUINO_EVENT_ETH_GOT_IP:
+      Serial.println("ETH Got IP");
+      Serial.println(ETH);
+      eth_connected = true;
+      break;
+    case ARDUINO_EVENT_ETH_LOST_IP:
+      Serial.println("ETH Lost IP");
+      eth_connected = false;
+      break;
+    case ARDUINO_EVENT_ETH_DISCONNECTED:
+      Serial.println("ETH Disconnected");
+      eth_connected = false;
+      break;
+    case ARDUINO_EVENT_ETH_STOP:
+      Serial.println("ETH Stopped");
+      eth_connected = false;
+      break;
+    default: break;
+  }
+}
+
+void setup() {
+    pinMode(SD_CS, OUTPUT);      digitalWrite(SD_CS, HIGH);
+    SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
+    Serial.begin(115200);
+    SD.begin(SD_CS);
+
+    Network.onEvent(onEvent);
+    ETH.begin();
+    while (!eth_connected) delay(100);
+    // Eth Connected,
+
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(21); // default 0...21
+    audio.connecttohost("https://wdr-wdr2-ruhrgebiet.icecastssl.wdr.de/wdr/wdr2/ruhrgebiet/mp3/128/stream.mp3"); // mp3
+}
+
+void loop(){
+    vTaskDelay(1);
+    audio.loop();
+}
+
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}

lib/ESP32-audioI2S/examples/I2Saudio/I2Saudio.ino

@@ -0,0 +1,100 @@
+//**********************************************************************************************************
+//*    audioI2S-- I2S audiodecoder for ESP32,                                                              *
+//**********************************************************************************************************
+//
+// first release on 11/2018
+// Version 3  , Jul.02/2020
+//
+//
+// THE SOFTWARE IS PROVIDED "AS IS" FOR PRIVATE USE ONLY, IT IS NOT FOR COMMERCIAL USE IN WHOLE OR PART OR CONCEPT.
+// FOR PERSONAL USE IT IS SUPPLIED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+// WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR
+// OR COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
+//
+
+#include "Arduino.h"
+#include "WiFiMulti.h"
+#include "Audio.h"
+#include "SPI.h"
+#include "SD.h"
+#include "FS.h"
+
+// Digital I/O used
+#define SD_CS          5
+#define SPI_MOSI      23
+#define SPI_MISO      19
+#define SPI_SCK       18
+#define I2S_DOUT      25
+#define I2S_BCLK      27
+#define I2S_LRC       26
+
+Audio audio;
+WiFiMulti wifiMulti;
+String ssid =     "xxxxx";
+String password = "xxxxx";
+
+
+void setup() {
+    pinMode(SD_CS, OUTPUT);
+    digitalWrite(SD_CS, HIGH);
+    SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
+    SPI.setFrequency(1000000);
+    Serial.begin(115200);
+    SD.begin(SD_CS);
+    WiFi.mode(WIFI_STA);
+    wifiMulti.addAP(ssid.c_str(), password.c_str());
+    wifiMulti.run();
+    if(WiFi.status() != WL_CONNECTED){
+        WiFi.disconnect(true);
+        wifiMulti.run();
+    }
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(12); // 0...21
+
+//    audio.connecttoFS(SD, "test.wav");
+//    audio.connecttohost("http://www.wdr.de/wdrlive/media/einslive.m3u");
+//    audio.connecttohost("http://somafm.com/wma128/missioncontrol.asx"); //  asx
+//    audio.connecttohost("http://mp3.ffh.de/radioffh/hqlivestream.aac"); //  128k aac
+      audio.connecttohost("http://mp3.ffh.de/radioffh/hqlivestream.mp3"); //  128k mp3
+}
+
+void loop(){
+    vTaskDelay(1);
+    audio.loop();
+    if(Serial.available()){ // put streamURL in serial monitor
+        audio.stopSong();
+        String r=Serial.readString(); r.trim();
+        if(r.length()>5) audio.connecttohost(r.c_str());
+        log_i("free heap=%i", ESP.getFreeHeap());
+    }
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}

lib/ESP32-audioI2S/examples/M5Core2/M5Core2.ino

@@ -0,0 +1,104 @@
+//**********************************************************************************************************
+//*    audioI2S-- I2S audiodecoder for M5Stack Core2                                                       *
+//**********************************************************************************************************
+//
+// first release on May.12/2021
+//
+//
+// THE SOFTWARE IS PROVIDED "AS IS" FOR PRIVATE USE ONLY, IT IS NOT FOR COMMERCIAL USE IN WHOLE OR PART OR CONCEPT.
+// FOR PERSONAL USE IT IS SUPPLIED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+// WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR
+// OR COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
+//
+
+#include <M5Core2.h>
+#include "Audio.h"
+
+// Digital I/O used
+#define SD_CS          4
+#define SD_MOSI       23
+#define SD_MISO       38
+#define SD_SCK        18
+#define I2S_DOUT       2
+#define I2S_BCLK      12
+#define I2S_LRC        0
+
+Audio audio;
+String ssid =     "xxxxxx";
+String password = "xxxxxx";
+
+
+void setup() {
+  M5.begin(true, true, true, true);
+  M5.Axp.SetSpkEnable(true);
+  M5.Lcd.fillScreen(BLACK);
+  M5.Lcd.setTextColor(WHITE);
+  M5.Lcd.setTextSize(2);
+
+  pinMode(SD_CS, OUTPUT);
+  digitalWrite(SD_CS, HIGH);
+  SPI.begin(SD_SCK, SD_MISO, SD_MOSI);
+  SPI.setFrequency(1000000);
+  SD.begin(SD_CS);
+
+  audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+  audio.setVolume(15); // 0...21
+
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid.c_str(), password.c_str());
+  while (!WiFi.isConnected()) {
+    delay(10);
+  }
+  ESP_LOGI(TAG, "Connected");
+  ESP_LOGI(TAG, "Starting MP3...\n");
+
+//  audio.connecttoFS(SD, "/320k_test.mp3");
+//  audio.connecttoFS(SD, "test.wav");
+  audio.connecttohost("http://air.ofr.fm:8008/jazz/mp3/128");
+//  audio.connecttospeech("Миска вареників з картоплею та шкварками, змащених салом!", "uk-UA");
+}
+
+void loop() {
+    vTaskDelay(1);
+    audio.loop();
+    if(Serial.available()){ // put streamURL in serial monitor
+        audio.stopSong();
+        String r=Serial.readString();
+        r.trim();
+        if(r.length()>5) audio.connecttohost(r.c_str());
+        log_i("free heap=%i", ESP.getFreeHeap());
+    }
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}
+void audio_eof_speech(const char *info){
+    Serial.print("eof_speech  ");Serial.println(info);
+}

lib/ESP32-audioI2S/examples/M5StackNode/M5StackNode.ino

@@ -0,0 +1,48 @@
+
+// M5Stack Node support
+// thanks to Cellie - issue #35     25.Apr.2020
+// M5Stack board with Node base also need a MCLK signal on GPIO0.
+
+#include <WM8978.h> /* https://github.com/CelliesProjects/wm8978-esp32 */
+#include <Audio.h> /* https://github.com/schreibfaul1/ESP32-audioI2S */
+
+/* M5Stack Node WM8978 I2C pins */
+#define I2C_SDA     21
+#define I2C_SCL     22
+
+/* M5Stack Node I2S pins */
+#define I2S_BCK      5
+#define I2S_WS      13
+#define I2S_DOUT     2
+#define I2S_DIN     34
+
+/* M5Stack WM8978 MCLK gpio number */
+#define I2S_MCLKPIN  0
+
+WM8978 dac;
+Audio audio;
+
+void setup() {
+    /* Setup wm8978 I2C interface */
+    if (!dac.begin(I2C_SDA, I2C_SCL)) {
+        log_e("Error setting up dac. System halted");
+        while (1) delay(100);
+    }
+
+    dac.setSPKvol(40); /* max 63 */
+    dac.setHPvol(32, 32);
+
+    /* Setup wm8978 I2S interface */
+    audio.setPinout(I2S_BCK, I2S_WS, I2S_DOUT, I2S_MCLKPIN);
+
+    WiFi.begin("xxx", "xxx");
+    while (!WiFi.isConnected()) { delay(10); }
+
+    log_i("Connected\nStarting MP3...\n");
+    audio.connecttohost("http://icecast.omroep.nl/3fm-bb-mp3");
+}
+
+void loop() {
+    vTaskDelay(1);
+    audio.loop();
+}

lib/ESP32-audioI2S/examples/M5StickCPlus/M5StickCPlus.ino

@@ -0,0 +1,86 @@
+//**********************************************************************************************************
+//*    audioI2S-- I2S audiodecoder for M5StickC Plus and SPK HAT                                           *
+//**********************************************************************************************************
+//
+// first release on May.12/2021
+//
+//
+// THE SOFTWARE IS PROVIDED "AS IS" FOR PRIVATE USE ONLY, IT IS NOT FOR COMMERCIAL USE IN WHOLE OR PART OR CONCEPT.
+// FOR PERSONAL USE IT IS SUPPLIED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+// WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR
+// OR COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
+//
+
+#include <M5StickCPlus.h>
+#include "Audio.h"
+
+Audio audio = Audio(true);
+
+String ssid =     "xxxxxxxx";
+String password = "xxxxxxxx";
+
+void setup() {
+    M5.begin(false);        // Lcd disabled to reduce noise
+    M5.Axp.ScreenBreath(1); // Lower Lcd backlight
+    pinMode(36, INPUT);
+    gpio_pulldown_dis(GPIO_NUM_25);
+    gpio_pullup_dis(GPIO_NUM_25);
+    M5.Beep.tone(44100); // Built-in buzzer tone
+    M5.Beep.end();       // disabled
+
+    audio.setVolume(15); // 0...21
+
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(ssid.c_str(), password.c_str());
+    while (!WiFi.isConnected()) { delay(10); }
+    ESP_LOGI(TAG, "Connected");
+    ESP_LOGI(TAG, "Starting MP3...\n");
+
+    audio.connecttohost("http://air.ofr.fm:8008/jazz/mp3/128");
+    //  audio.connecttospeech("Миска вареників з картоплею та шкварками, змащених салом!", "uk-UA");
+}
+
+void loop() {
+    vTaskDelay(1);
+    audio.loop();
+    if(Serial.available()){ // put streamURL in serial monitor
+        audio.stopSong();
+        String r=Serial.readString();
+        r.trim();
+        if(r.length()>5) audio.connecttohost(r.c_str());
+        log_i("free heap=%i", ESP.getFreeHeap());
+    }
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}
+void audio_eof_speech(const char *info){
+    Serial.print("eof_speech  ");Serial.println(info);
+}

lib/ESP32-audioI2S/examples/OpenAI_Speech/readme.md

@@ -0,0 +1,162 @@
+# OpenAI Speech
+
+### platformio.ini - example for: [XIAO ESP32S3](https://www.seeedstudio.com/XIAO-ESP32S3-p-5627.html)
+
+```ShellCheck Config
+[env:seeed_xiao_esp32s3]
+platform = espressif32
+board = seeed_xiao_esp32s3
+framework = arduino
+monitor_speed = 115200
+build_flags = 
+	-Wall
+	-Wextra
+	-DCORE_DEBUG_LEVEL=3
+	-DBOARD_HAS_PSRAM
+    -DAUDIO_LOG
+	-DARDUINO_RUNNING_CORE=1       ; Arduino Runs On Core (setup, loop)
+	-DARDUINO_EVENT_RUNNING_CORE=1 ; Events Run On Core
+lib_deps = 
+	https://github.com/schreibfaul1/ESP32-audioI2S.git
+```
+
+### main.cpp - using xTask example:
+
+```cpp
+#include <Arduino.h>
+#include "SPI.h"
+#include <WiFi.h>
+#include <WiFiMulti.h>
+#include "Audio.h"
+
+// WiFi credentials
+#define WIFI_SSID "<YOUR_WIFI_SSID>"
+#define PASSWORD "<YOUR_WIFI_PASSWORD>"
+#define OPENAI_API_KEY "<YOUR_OPENAI_API_KEY>"
+
+// Configure I2S pins
+#define I2S_LRC D1
+#define I2S_DOUT D2
+#define I2S_BCLK D3
+#define I2S_MCLK 0
+
+// Vars
+bool isWIFIConnected;
+
+String result = "Added OpenAI Text to speech API support";
+String instructions = "Voice: Gruff, fast-talking, and a little worn-out, like a New York cabbie who's seen it all but still keeps things moving.\n\n";
+
+// Inits
+WiFiMulti wifiMulti;
+TaskHandle_t playaudio_handle;
+QueueHandle_t audioQueue;
+Audio audio;
+
+// Declaration
+void audio_info(const char *info);
+void wifiConnect(void *pvParameters);
+void playaudio(void *pvParameters);
+
+// Default
+void setup() {
+    Serial.begin(115200);
+    isWIFIConnected = false;
+
+    // Create queue
+    audioQueue = xQueueCreate(1, sizeof(int));
+    if (audioQueue == NULL) {
+        Serial.println("Failed to create audioQueue");
+        while(1);
+    }
+
+    // Create tasks
+    xTaskCreate(wifiConnect, "wifi_Connect", 4096, NULL, 0, NULL);
+    delay(500);
+    xTaskCreate(playaudio, "playaudio", 1024 * 8, NULL, 3, &playaudio_handle);
+}
+
+void loop(void) {
+    audio.loop();
+}
+
+void audio_info(const char *info) {
+    Serial.print("audio_info: ");
+    Serial.println(info);
+}
+
+void wifiConnect(void *pvParameters) {
+    while(1) {
+        if (!isWIFIConnected) {
+            wifiMulti.addAP(WIFI_SSID, PASSWORD);
+            Serial.println("Connecting to WiFi...");
+            while (wifiMulti.run() != WL_CONNECTED) {
+                vTaskDelay(500);
+            }
+            Serial.print("Connected to WiFi\nIP: ");
+            Serial.println(WiFi.localIP());
+            isWIFIConnected = true;
+
+            Serial.println("Sending result...");
+            int eventMessage;
+            if (xQueueSend(audioQueue, &eventMessage, 0) != pdPASS) {
+                Serial.println("Failed to send result to queue");
+            }
+        } else {
+            vTaskDelay(1000 / portTICK_PERIOD_MS);
+        }
+    }
+}
+
+void playaudio(void *pvParameters) {
+    while(1) {
+        if (isWIFIConnected && audioQueue != 0) {
+            int eventMessage;
+            Serial.println("Waiting for result...");
+            if (xQueueReceive(audioQueue, &eventMessage, portMAX_DELAY) == pdPASS) {
+                Serial.print("Received result: ");
+                Serial.println(result);
+
+                // Speech
+                audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT, -1);
+                audio.setVolume(15); // 0...21
+                audio.openai_speech(OPENAI_API_KEY, "tts-1", result, instructions, "shimmer", "mp3", "1");
+            }
+        } else {
+            vTaskDelay(1000 / portTICK_PERIOD_MS);
+        }
+    }
+}
+```
+---
+
+### console output example:
+
+```ShellSession
+--- Terminal on /dev/ttyACM0 | 115200 8-N-1
+--- Available filters and text transformations: colorize, debug, default, direct, esp32_exception_decoder, hexlify, log2file, nocontrol, printable, send_on_enter, time
+--- More details at https://bit.ly/pio-monitor-filters
+--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H
+[  3911][I][WiFiMulti.cpp:114] run(): [WIFI] scan done
+[  3911][I][WiFiMulti.cpp:119] run(): [WIFI] 15 networks found
+[  3911][I][WiFiMulti.cpp:160] run(): [WIFI] Connecting BSSID: 26:AD:69:C2:AB:E8 SSID: OpwnSS Channel: 11 (-38)
+[  4000][I][WiFiMulti.cpp:174] run(): [WIFI] Connecting done.
+Connected to WiFi
+IP: 192.168.86.23
+audio_info: Connect to new host: "api.openai.com"
+audio_info: PSRAM found, inputBufferSize: 638965 bytes
+[  4698][I][Audio.cpp:5331] ts_parsePacket(): parseTS reset
+audio_info: buffers freed, free Heap: 255068 bytes
+audio_info: connect to api.openai.com on port 443 path /v1/audio/speech
+audio_info: SSL has been established in 925 ms, free Heap: 213908 bytes
+[  6921][I][Audio.cpp:4000] parseContentType(): ContentType audio/mpeg, format is mp3
+audio_info: MP3Decoder has been initialized, free Heap: 214564 bytes , free stack 3760 DWORDs
+[  6924][I][Audio.cpp:3846] parseHttpResponseHeader(): Switch to DATA, metaint is 0
+audio_info: stream ready
+audio_info: syncword found at pos 0
+audio_info: Channels: 1
+audio_info: SampleRate: 24000
+audio_info: BitsPerSample: 16
+audio_info: BitRate: 160000
+audio_info: slow stream, dropouts are possible
+audio_info: End of Stream.
+```

lib/ESP32-audioI2S/examples/OpenAI_Speech/src/main.cpp

@@ -0,0 +1,61 @@
+#include <Arduino.h>
+#include "SPI.h"
+#include <WiFi.h>
+#include <WiFiMulti.h>
+#include "Audio.h"
+
+// WiFi credentials
+#define WIFI_SSID "<YOUR_WIFI_SSID>"
+#define PASSWORD "<YOUR_WIFI_PASSWORD>"
+#define OPENAI_API_KEY "<YOUR_OPENAI_API_KEY>" // https://platform.openai.com/api-keys
+
+// Configure I2S pins
+#define I2S_LRC D1
+#define I2S_DOUT D2
+#define I2S_BCLK D3
+#define I2S_MCLK 0
+
+// Inits
+WiFiMulti wifiMulti;
+Audio audio;
+
+
+String input = "Added OpenAI Text to speech API support";
+String instructions = "Voice: Gruff, fast-talking, and a little worn-out, like a New York cabbie who's seen it all but still keeps things moving.\n\n"
+                      "Tone: Slightly exasperated but still functional, with a mix of sarcasm and no-nonsense efficiency.\n\n"
+                      "Dialect: Strong New York accent, with dropped \"r\"s, sharp consonants, and classic phrases like whaddaya and lemme guess.\n\n"
+                      "Pronunciation: Quick and clipped, with a rhythm that mimics the natural hustle of a busy city conversation.\n\n"
+                      "Features: Uses informal, straight-to-the-point language, throws in some dry humor, and keeps the energy just on the edge of impatience but still";
+
+// Declaration
+void audio_info(const char *info);
+
+// Default
+void setup() {
+    Serial.begin(115200);
+    // Wifi
+    wifiMulti.addAP(WIFI_SSID, PASSWORD);
+    Serial.println("Connecting to WiFi...");
+    while (wifiMulti.run() != WL_CONNECTED) {
+        delay(500);
+    }
+    Serial.print("Connected to WiFi\nIP: ");
+    Serial.println(WiFi.localIP());
+
+    delay(500);
+
+    // Speech
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT, -1);
+    audio.setVolume(15); // 0...21
+    audio.openai_speech(OPENAI_API_KEY, "tts-1", input, instructions, "shimmer", "mp3", "1");
+}
+
+void loop(void) {
+    vTaskDelay(1);
+    audio.loop();
+}
+
+void audio_info(const char *info) {
+    Serial.print("audio_info: ");
+    Serial.println(info);
+}

lib/ESP32-audioI2S/examples/Simple_WiFi_Radio/Simple_WiFi_Radio.ino

@@ -0,0 +1,232 @@
+#include <Arduino.h>
+#include <Preferences.h>
+#include <SPI.h>
+#include <WiFi.h>
+#include "ili9486.h"   //see my repository at github "https://github.com/schreibfaul1/ESP32-TFT-Library-ILI9486"
+#include "Audio.h" //see my repository at github "https://github.com/schreibfaul1/ESP32-audioI2S"
+
+#define TFT_CS        22
+#define TFT_DC        21
+#define TP_CS          5
+#define TFT_BL        12
+#define TP_IRQ        39
+#define SPI_MOSI      23
+#define SPI_MISO      19
+#define SPI_SCK       18
+#define I2S_DOUT      25
+#define I2S_BCLK      27
+#define I2S_LRC       26
+
+Preferences pref;
+TFT tft;
+TP tp(TP_CS, TP_IRQ);
+Audio audio;
+
+String ssid =     "Wolles-FRITZBOX";
+String password = "40441061073895958449";
+
+String stations[] ={
+        "http://0n-80s.radionetz.de:8000/0n-70s.mp3",
+        "http://mediaserv30.live-streams.nl:8000/stream",
+        "http://www.surfmusic.de/m3u/100-5-das-hitradio,4529.m3u",
+        "http://stream.1a-webradio.de/deutsch/mp3-128/vtuner-1a",
+        "http://mp3.ffh.de/radioffh/hqlivestream.aac", //  128k aac
+        "http://www.antenne.de/webradio/antenne.m3u",
+        "http://listen.rusongs.ru/ru-mp3-128",
+        "http://edge.audio.3qsdn.com/senderkw-mp3",
+        "https://stream.srg-ssr.ch/rsp/aacp_48.asx", // SWISS POP
+};
+
+//some global variables
+
+uint8_t max_volume   = 21;
+uint8_t max_stations = 0;   //will be set later
+uint8_t cur_station  = 0;   //current station(nr), will be set later
+uint8_t cur_volume   = 0;   //will be set from stored preferences
+int8_t  cur_btn      =-1;   //current button (, -1 means idle)
+
+enum action{VOLUME_UP=0, VOLUME_DOWN=1, STATION_UP=2, STATION_DOWN=3};
+enum staus {RELEASED=0, PRESSED=1};
+
+struct _btns{
+    uint16_t x; //PosX
+    uint16_t y; //PosY
+    uint16_t w; //Width
+    uint16_t h; //Hight
+    uint8_t  a; //Action
+    uint8_t  s; //Status
+};
+typedef _btns btns;
+
+btns btn[4];
+
+
+void setTFTbrightness(uint8_t duty) { // duty 0...100 (min...max)
+    uint8_t d = round((double)duty * 2.55); // #186
+    ledcWrite(TFT_BL, d);
+}
+
+//**************************************************************************************************
+//                                              G U I                                              *
+//**************************************************************************************************
+void draw_button(btns b){
+    uint16_t color=TFT_BLACK;
+    uint8_t r=4, o=r*3;
+    if(b.s==RELEASED) color=TFT_GOLD;
+    if(b.s==PRESSED)  color=TFT_DEEPSKYBLUE;
+    tft.drawRoundRect(b.x, b.y, b.w, b.h, r, color);
+    switch(b.a){
+        case VOLUME_UP:
+            tft.fillTriangle(b.x+b.w/2, b.y+o, b.x+o, b.y+b.h-o, b.x+b.w-o, b.y+b.h-o, color); break;
+        case VOLUME_DOWN:
+            tft.fillTriangle(b.x+o, b.y+o, b.x+b.w/2, b.y+b.h-o, b.x+b.w-o, b.y+o, color); break;
+        case STATION_UP:
+            tft.fillTriangle(b.x+o, b.y+o, b.x+o, b.y+b.h-o, b.x+b.w-o, b.y+b.h/2, color); break;
+        case STATION_DOWN:
+            tft.fillTriangle(b.x+b.w-o, b.y+o, b.x+o, b.y+b.h/2, b.x+b.w-o, b.y+b.h-o, color); break;
+    }
+}
+void write_stationNr(uint8_t nr){
+    tft.fillRect(80, 250, 80, 60, TFT_BLACK);
+    String snr = String(nr);
+    if(snr.length()<2) snr = "0"+snr;
+    tft.setCursor(98, 255);
+    tft.setFont(Times_New_Roman66x53);
+    tft.setTextColor(TFT_YELLOW);
+    tft.print(snr);
+}
+void write_volume(uint8_t vol){
+    tft.fillRect(320, 250, 80, 60, TFT_BLACK);
+    String svol = String(vol);
+    if(svol.length()<2) svol = "0"+svol;
+    tft.setCursor(338, 255);
+    tft.setFont(Times_New_Roman66x53);
+    tft.setTextColor(TFT_YELLOW);
+    tft.print(svol);
+}
+void write_stationName(String sName){
+    tft.fillRect(0, 0, 480, 100, TFT_BLACK);
+    tft.setFont(Times_New_Roman43x35);
+    tft.setTextColor(TFT_CORNSILK);
+    tft.setCursor(20, 20);
+    tft.print(sName);
+}
+void write_streamTitle(String sTitle){
+    tft.fillRect(0, 100, 480, 150, TFT_BLACK);
+    tft.setFont(Times_New_Roman43x35);
+    tft.setTextColor(TFT_LIGHTBLUE);
+    tft.setCursor(20, 100);
+    int l = tft.writeText((const uint8_t*) sTitle.c_str(), 100 + 150); // do not write under y=250
+    if(l < sTitle.length()){
+        // sTitle has been shortened, is too long for the display
+    }
+}
+//**************************************************************************************************
+//                                           S E T U P                                             *
+//**************************************************************************************************
+void setup() {
+    btn[0].x= 20; btn[0].y=250; btn[0].w=60; btn[0].h=60; btn[0].a=STATION_DOWN; btn[0].s=RELEASED;
+    btn[1].x=160; btn[1].y=250; btn[1].w=60; btn[1].h=60; btn[1].a=STATION_UP;   btn[1].s=RELEASED;
+    btn[2].x=260; btn[2].y=250; btn[2].w=60; btn[2].h=60; btn[2].a=VOLUME_UP;    btn[2].s=RELEASED;
+    btn[3].x=400; btn[3].y=250; btn[3].w=60; btn[3].h=60; btn[3].a=VOLUME_DOWN;  btn[3].s=RELEASED;
+    max_stations= sizeof(stations)/sizeof(stations[0]); log_i("max stations %i", max_stations);
+    Serial.begin(115200);
+    pref.begin("WebRadio", false);  // instance of preferences for defaults (station, volume ...)
+    if(pref.getShort("volume", 1000) == 1000){ // if that: pref was never been initialized
+        pref.putShort("volume", 10);
+        pref.putShort("station", 0);
+    }
+    else{ // get the stored values
+        cur_station = pref.getShort("station");
+        cur_volume = pref.getShort("volume");
+    }
+
+    WiFi.begin(ssid.c_str(), password.c_str());
+    while (WiFi.status() != WL_CONNECTED){
+        delay(2000);
+        Serial.print(".");
+    }
+    log_i("Connect to %s", WiFi.SSID().c_str());
+    ledcAttach(TFT_BL, 1200, 8); // 1200 Hz PWM and 8 bit resolution
+    setTFTbrightness(100);
+    tft.begin(TFT_CS, TFT_DC, VSPI, SPI_MOSI, SPI_MISO, SPI_SCK);
+    tft.setRotation(3);
+    tp.setRotation(3);
+    tft.setFont(Times_New_Roman43x35);
+    tft.fillScreen(TFT_BLACK);
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(cur_volume); // 0...21
+    audio.connecttohost(stations[cur_station].c_str());
+    for(uint8_t i=0; i<(sizeof(btn)/sizeof(*btn)); i++) draw_button(btn[i]);
+    write_volume(cur_volume);
+    write_stationNr(cur_station);
+}
+//**************************************************************************************************
+//                                            L O O P                                              *
+//**************************************************************************************************
+void loop(){
+    vTaskDelay(1);
+    audio.loop();
+    tp.loop();
+}
+//**************************************************************************************************
+//                                           E V E N T S                                           *
+//**************************************************************************************************
+void audio_info(const char *info){
+    Serial.print("audio_info: "); Serial.println(info);
+}
+void audio_showstation(const char *info){
+    write_stationName(String(info));
+}
+void audio_showstreamtitle(const char *info){
+    String sinfo=String(info);
+    sinfo.replace("|", "\n");
+    write_streamTitle(sinfo);
+}
+
+void tp_pressed(uint16_t x, uint16_t y){
+    for(uint8_t i=0; i<(sizeof(btn)/sizeof(*btn)); i++){
+        if(x>btn[i].x && (x<btn[i].x+btn[i].w)){
+            if(y>btn[i].y && (y<btn[i].y+btn[i].h)){
+                cur_btn=i;
+                btn[cur_btn].s=PRESSED;
+                draw_button(btn[cur_btn]);
+            }
+        }
+    }
+}
+void tp_released(){
+    if(cur_btn !=-1){
+        btn[cur_btn].s=RELEASED;
+        draw_button(btn[cur_btn]);
+        switch(btn[cur_btn].a){
+            case VOLUME_UP:   if(cur_volume<max_volume){
+                                cur_volume++;
+                                write_volume(cur_volume);
+                                audio.setVolume(cur_volume);
+                                pref.putShort("volume", cur_volume);} // store the current volume in nvs
+                              break;
+            case VOLUME_DOWN: if(cur_volume>0){
+                                cur_volume-- ;
+                                write_volume(cur_volume);
+                                audio.setVolume(cur_volume);
+                                pref.putShort("volume", cur_volume);} // store the current volume in nvs
+                              break;
+            case STATION_UP:  if(cur_station<max_stations-1){
+                                cur_station++;
+                                write_stationNr(cur_station);
+                                tft.fillRect(0, 0, 480, 250, TFT_BLACK);
+                                audio.connecttohost(stations[cur_station].c_str());
+                                pref.putShort("station", cur_station);} // store the current station in nvs
+                              break;
+            case STATION_DOWN:if(cur_station>0){
+                                cur_station--;
+                                write_stationNr(cur_station);
+                                tft.fillRect(0, 0, 480, 250, TFT_BLACK);
+                                audio.connecttohost(stations[cur_station].c_str());
+                                pref.putShort("station", cur_station);} // store the current station in nvs
+                              break;
+        }
+    }
+    cur_btn=-1;
+}

lib/ESP32-audioI2S/examples/Synchronised lyrics/README.md

@@ -0,0 +1,10 @@
+# Synchronised lyrics/text
+
+Synchronized Lyrics or also called 'Lyrics3' is a format for storing lyrics in the ID3 metadata of audio files such as MP3s. The synchronized texts are saved in a special ID3 tag called **SYLT**.
+
+Unlike plain lyrics, synced lyrics can contain not only the lyrics of the song, but also information about when each section of lyrics should be displayed. This information is stored in the form of timestamps that indicate when each piece of text should begin and end.
+Once the synced lyrics are stored in the ID3 metadata, they can be viewed by a compatible audio player. The audio player reads the SYLT tags and displays the lyrics of the song in real time while the song is playing. This allows the listener to follow the lyrics of the song in real time and sing along.
+
+@moononournation had the idea of ​​reading the SYLT tag with the audioI2S library, and he also wrote the necessary source code.
+
+The example shown here reads an mp3 file containing the SYLT tag, plays the mp3 file and displays the lyrics according to the timestamps in the serial terminal.

lib/ESP32-audioI2S/examples/Synchronised lyrics/synchronised_lyrics.ino

@@ -0,0 +1,96 @@
+#include "Arduino.h"
+#include "Audio.h"
+#include "SD_MMC.h"
+#include "Ticker.h"
+
+Audio audio;
+Ticker   ticker;
+char     *lyricsText;
+size_t   lyricsTextSize = 0;
+uint16_t lyricsPtr = 0;
+uint32_t timeStamp = 0;
+uint32_t ms = 0;
+char     chbuf[512];
+
+#define I2S_LRC     26
+#define I2S_DOUT    25
+#define I2S_BCLK    27
+#define I2S_MCLK     0
+
+#define SD_MMC_D0    2
+#define SD_MMC_CLK  14
+#define SD_MMC_CMD  15
+
+
+size_t bigEndian(char* base, uint8_t numBytes, uint8_t shiftLeft = 8){
+    uint64_t result = 0;
+    if(numBytes < 1 || numBytes > 8) return 0;
+    for (int i = 0; i < numBytes; i++) {
+            result += *(base + i) << (numBytes -i - 1) * shiftLeft;
+    }
+    if(result > SIZE_MAX) {log_e("range overflow"); result = 0;} // overflow
+    return (size_t)result;
+}
+
+void tckr(){ // caller every 100ms
+    if(audio.isRunning()){
+        ms += 100;
+        if(ms >= timeStamp){
+            Serial.print(chbuf);
+            strcpy(chbuf, lyricsText + lyricsPtr); lyricsPtr += strlen(chbuf) + 1; // strlen + '\0'
+            timeStamp = bigEndian(lyricsText + lyricsPtr, 4); lyricsPtr += 4;
+        }
+    }
+    else{
+        if(lyricsText) {free(lyricsText); lyricsText = NULL; lyricsTextSize = 0;}
+
+        ticker.detach();
+    }
+}
+
+void setup() {
+    pinMode(SD_MMC_D0, INPUT_PULLUP);
+    Serial.begin(115200);
+    if(!SD_MMC.begin( "/sdcard", true, false, 20000)){
+        Serial.println("Card Mount Failed");
+        return;
+    }
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(10); // 0...21
+    audio.connecttoFS(SD_MMC, "/Little London Girl(lyrics).mp3");
+}
+
+void loop(){
+    vTaskDelay(1);
+    audio.loop();
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+//    if(strncmp(info, "Year: ", 6) == 0) Serial.println(info + 6);
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+}
+
+void audio_id3lyrics(File &file, const size_t pos, const size_t size) {
+    Serial.printf("\naudio_id3lyrics, pos: %d, size: %d\n", pos, size);
+    lyricsText = (char *)malloc(size);
+    lyricsTextSize = size;
+    file.seek(pos);
+    file.read((uint8_t *)lyricsText, size);
+    Serial.printf("text encoding: %i\n", lyricsText[0]); // 0: ASCII, 3: UTF-8
+    char lang[14]; memcpy(lang, (const char*)lyricsText + 1, 3); lang[3] = '\0'; Serial.printf("language: %s\n", lang);
+    Serial.printf("time stamp format: %i\n", lyricsText[4]);
+    Serial.printf("content type: %i\n", lyricsText[5]);
+    Serial.printf("content descriptor: %i\n\n", lyricsText[6]);
+    lyricsPtr = 7;
+    strcpy(chbuf, lyricsText + lyricsPtr); lyricsPtr += strlen(chbuf) + 1; // strlen + '\0'
+    timeStamp = bigEndian(lyricsText + lyricsPtr, 4);
+    ticker.attach(0.1, tckr); lyricsPtr += 4;
+}
+