diff --git a/README.md b/README.md
index d081473..3b4beb1 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ MISO -> D6
 ```
 
 ## TODOs
-* Card Reader with SPI. Configure hspi, second SPI channel?
+* Card Reader with SPI. Configure hspi, second SPI channel? Or does SD Card + RFID run at the same channel?
 
 ![](images/wemos-d1-mini-esp32.png)
 
diff --git a/platformio.ini b/platformio.ini
index cbcf853..2879803 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -17,5 +17,6 @@ lib_deps =
 	me-no-dev/AsyncTCP@^1.1.1
 	me-no-dev/ESP Async WebServer@^1.2.3
 	alanswx/ESPAsyncWiFiManager@^0.31
+	miguelbalboa/MFRC522@^1.4.10
 monitor_speed = 115200
 board_build.partitions = huge_app.csv
diff --git a/src/globals.h b/src/globals.h
index 19ed836..02741b1 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -5,5 +5,11 @@ void stop();
 
 void start();
 
+boolean buttonPressed(const uint8_t pin);
+
+unsigned long lastStart = 0;
+
+const int startDelay = 250;
+
 
 #endif
\ No newline at end of file
diff --git a/src/helper.h b/src/helper.h
index 27de02c..733776e 100644
--- a/src/helper.h
+++ b/src/helper.h
@@ -2,6 +2,7 @@
 #define HELPER_H_
 
 #include <SD.h>
+#include "globals.h"
 
 
 struct DirectoryNode {
@@ -89,4 +90,6 @@ DirectoryNode* findFirstMP3Node(DirectoryNode* currentNode) {
   return NULL;
 }
 
+
+
 #endif /* HELPER_H_ */
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 06e7b29..22de49a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -9,12 +9,24 @@
 
 #include "Audio.h"
 
+
+
+
+#include <SPI.h>
+#include <SD.h>
+#include <MFRC522.h>//RFID Reader
+
+// define pins for RFID
+#define CS_RFID 32
+#define RST_RFID 33
+
+// Audio DAC
 #define I2S_DOUT 26 // connect to DAC pin DIN
 #define I2S_BCLK 27 // connect to DAC pin BCK
 #define I2S_LRC 25  // connect to DAC pin LCK
 
-#include <SPI.h>
-#include <SD.h>
+#define BTN_START_STOP 17 // Button on D3 and GND
+
 
 #include "globals.h"
 #include "WebContent.h"
@@ -24,9 +36,7 @@
 File root;
 File mp3File;
 
-unsigned long lastStart = 0;
 
-const int startDelay = 250;
 
 Audio audio;
 
@@ -42,6 +52,8 @@ boolean blockState = false;
 
 
 
+
+
 void playNextMp3()
 {
   blockState = true;
@@ -161,7 +173,7 @@ void setup()
   // put your setup code here, to run once:
   Serial.begin(115200);
 
-  pinMode(D3, INPUT_PULLUP);
+  pinMode(BTN_START_STOP, INPUT_PULLUP);
 
   // first parameter is name of access point, second is the password
   AsyncWiFiManager wifiManager(&server, &dns);
@@ -219,13 +231,28 @@ void loop()
 {
 
   audio.loop();
-  if (digitalRead(D3) == LOW)
+
+  if (buttonPressed(BTN_START_STOP)) {
+    if (audio.isRunning()) {
+      stop();
+    } else {
+      start();
+    }
+  }
+
+}
+
+boolean buttonPressed(const uint8_t pin) {
+  if (digitalRead(pin) == LOW)
   {
     unsigned long now = millis();
     if (now - lastStart > startDelay)
     {
-      playNextMp3();
+      
       lastStart = now;
+      return true;
     }
   }
-}
\ No newline at end of file
+  return false;
+}
+