ESP32 BLE Media Player controls from serial

README.md

ESP32 BLE Media Player controls from serial

This is made mainly to test if your board supports sending them.

This code uses the ESP32-BLE-Keyboard library.

To avoid the ESP not sending the commands after a reconnection, please use at least version 0.3.1-beta and uncomment #define USE_NIMBLE on the first line of BleKeyboard.h. You will also need to install the NimBLE-Arduino library by h2zero inside the Arduino IDE.

In order to receive the commands, add the ESP32 as a Bluetooth keyboard of your computer or mobile phone:

1. Go to your computers/phones settings
2. Ensure Bluetooth is turned on
3. Scan for Bluetooth devices
4. Connect to the device called "ESP32 BLE Media Player"
5. Connect to the serial of the ESP32
6. Send one of the supported keys:

• t: Toggle play/pause
• p: Previous track
• n: Next track
• u: Volume up
• d: VOlume down

esp32_ble_mediaplayer.ino

#include <BleKeyboard.h>

BleKeyboard bleKeyboard("ESP32 BLE Media Player", "Appu", 33);

void setup() {
  Serial.begin(115200);
  Serial.setTimeout(100); // Read keys faster

  Serial.println("Starting BLE work!");
  bleKeyboard.begin();
}

void loop() {
    if (bleKeyboard.isConnected()) {
      String in = Serial.readString().substring(0,1);
      if (in != "") {
        if (in == "t") {
          Serial.println("Toggle");
          bleKeyboard.write(KEY_MEDIA_PLAY_PAUSE);
        } else if (in == "p") {
          Serial.println("Prev");
          bleKeyboard.write(KEY_MEDIA_PREVIOUS_TRACK);
        } else if (in == "n") {
          Serial.println("Next");
          bleKeyboard.write(KEY_MEDIA_NEXT_TRACK);
        } else if (in == "u") {
          Serial.println("Vol.Up");
          bleKeyboard.write(KEY_MEDIA_VOLUME_UP);
        } else if (in == "d") {
          Serial.println("Vol.Dwn");
          bleKeyboard.write(KEY_MEDIA_VOLUME_DOWN);
        } else {
          Serial.printf("Read: %s\n", in);
        }
      }
      bleKeyboard.releaseAll(); // Maybe not needed
    }
}