# HannaBox

## Microcontroller

D1 Mini ESP32
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

### Amplifier
```
26 -> DIN
27 -> BCLK
25 -> LRC
5V -> Vin
GND -> GND
```

### SD Card

```
CS -> 22 (D1)
MOSI -> 23 (D7)
CLK -> 18 (D5)
MISO -> 19 (D6)
```

## Buttons

```
Start / Stop -> 17 and GND
```


## TODOs
* 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)

## Links

https://github.com/earlephilhower/ESP8266Audio

[Running two SPI devices at once](https://randomnerdtutorials.com/esp32-spi-communication-arduino/)