#include <BLE-MIDI.h>
#include <hardware/BLE-MIDI_ESP32.h>

BLEMIDI_CREATE_DEFAULT_ESP32_INSTANCE()

unsigned long t0 = millis();
bool isConnected = false;

// -----------------------------------------------------------------------------
//
// -----------------------------------------------------------------------------
void setup()
{
  Serial.begin(115200);
  while (!Serial);
  Serial.println("Booting");
  
  MIDI.begin(1);

  BLEMIDI.onConnected(OnBleMidiConnected);
  BLEMIDI.onDisconnected(OnBleMidiDisconnected);

  MIDI.setHandleNoteOn(OnBleMidiNoteOn);
  MIDI.setHandleNoteOff(OnBleMidiNoteOff);

  Serial.println(F("Ready"));
}

// -----------------------------------------------------------------------------
//
// -----------------------------------------------------------------------------
void loop()
{
  MIDI.read();

  if (isConnected && (millis() - t0) > 1000)
  {
    t0 = millis();

    MIDI.sendNoteOn(60, 127, 1); // note 60, velocity 127 on channel 1
    MIDI.sendNoteOff(60, 0, 1);
  }
}

// ====================================================================================
// Event handlers for incoming MIDI messages
// ====================================================================================

// -----------------------------------------------------------------------------
// rtpMIDI session. Device connected
// -----------------------------------------------------------------------------
void OnBleMidiConnected() {
  Serial.println(F("Connected"));
  isConnected = true;
}

// -----------------------------------------------------------------------------
// rtpMIDI session. Device disconnected
// -----------------------------------------------------------------------------
void OnBleMidiDisconnected() {
  Serial.println(F("Disconnected"));
  isConnected = false;
}

// -----------------------------------------------------------------------------
// received note on
// -----------------------------------------------------------------------------
void OnBleMidiNoteOn(byte channel, byte note, byte velocity) {
  Serial.print(F("Incoming NoteOn  from channel:"));
  Serial.print(channel);
  Serial.print(F(" note:"));
  Serial.print(note);
  Serial.print(F(" velocity:"));
  Serial.print(velocity);
  Serial.println();
}

// -----------------------------------------------------------------------------
// received note off
// -----------------------------------------------------------------------------
void OnBleMidiNoteOff(byte channel, byte note, byte velocity) {
  Serial.print(F("Incoming NoteOff from channel:"));
  Serial.print(channel);
  Serial.print(F(" note:"));
  Serial.print(note);
  Serial.print(F(" velocity:"));
  Serial.print(velocity);
  Serial.println();
}