Problem: BLEMIDI_CREATE_INSTANCE with custom names about arduino-ble-midi

[lathoub]

Look at the creation MACRO:

Arduino-BLE-MIDI/src/hardware/BLEMIDI_ESP32_NimBLE.h

Line 163 in 929c2fc

MIDI_NAMESPACE::MidiInterface<BLEMIDI_NAMESPACE::BLEMIDI_Transport<BLEMIDI_NAMESPACE::BLEMIDI_ESP32_NimBLE>, BLEMIDI_NAMESPACE::MySettings> Name((BLEMIDI_NAMESPACE::BLEMIDI_Transport<BLEMIDI_NAMESPACE::BLEMIDI_ESP32_NimBLE> &)BLE##Name);

This prefixes the chosen name (BLUETOOTHMIDI) with BLE and becomes: BLEBLUETOOTHMIDI

Working sketch:

#include <BLEMIDI_Transport.h>

#include <hardware/BLEMIDI_ESP32_NimBLE.h>
//#include <hardware/BLEMIDI_ESP32.h>
//#include <hardware/BLEMIDI_nRF52.h>
//#include <hardware/BLEMIDI_ArduinoBLE.h>

//BLEMIDI_CREATE_DEFAULT_INSTANCE()
BLEMIDI_CREATE_INSTANCE("BLMIDIESP32", BLUETOOTHMIDI)

unsigned long t0 = millis();
bool BLMisConnected = true;  //set it to yes to see it running

// -----------------------------------------------------------------------------
// When BLE connected, LED will turn on (indication that connection was successful)
// When receiving a NoteOn, LED will go out, on NoteOff, light comes back on.
// This is an easy and conveniant way to show that the connection is alive and working. 
// -----------------------------------------------------------------------------
void setup()
{
  BLUETOOTHMIDI.begin();

  pinMode(4, OUTPUT);
  digitalWrite(4, LOW);

  // uncommented by me
  BLEBLUETOOTHMIDI.setHandleConnected([]() {   
    BLMisConnected = true;
    digitalWrite(4, HIGH);
   });

  // uncommented by me
  // BLEMIDI.setHandleDisconnected([]() {
  //  BLMisConnected = false;
  //  digitalWrite(4, LOW);
  // });

  BLUETOOTHMIDI.setHandleNoteOn([](byte channel, byte note, byte velocity) {
    digitalWrite(4, LOW);
  });
  BLUETOOTHMIDI.setHandleNoteOff([](byte channel, byte note, byte velocity) {
    digitalWrite(4, HIGH);
  });
}

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

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

    BLUETOOTHMIDI.sendNoteOn (60, 100, 1); // note 60, velocity 100 on channel 1
  }
}

Good luck!

[lathoub]

The #include <hardware/BLEMIDI_ESP32.h> indeed creates errors (ESP32 repo has recently changed, that may be the source of the error), but NimBLE works fine.

Change the code to:

#include <BLEMIDI_Transport.h>

#include <hardware/BLEMIDI_ESP32_NimBLE.h>
//#include <hardware/BLEMIDI_ESP32.h>
//#include <hardware/BLEMIDI_nRF52.h>
//#include <hardware/BLEMIDI_ArduinoBLE.h>

[rigr]

Thanks for your fast reply, I feel honored. :)

I'd like to use the "BLMisConnected" variable so uncommented this:

BLEMIDI.setHandleConnected([]() {  // 'class midi::MidiInterface<bleMidi::BLEMIDI_Transport<bleMidi::BLEMIDI_ESP32>, 
                                             //  bleMidi::MySettings>' has no member named 'setHandleConnected'
    BLMisConnected = true;
    digitalWrite(4, HIGH);
  });

It does not compile -
28:17: error: 'class midi::MidiInterface<bleMidi::BLEMIDI_TransportbleMidi::BLEMIDI_ESP32_NimBLE, bleMidi::MySettings>' has no member named 'setHandleConnected'
BLUETOOTHMIDI.setHandleConnected( { // 'class midi::MidiInterface<bleMidi::BLEMIDI_TransportbleMidi::BLEMIDI_ESP32,

and when renamed to BLEMIDI I get:
28:3: error: 'BLEMIDI' was not declared in this scope
BLEMIDI.setHandleConnected( { // 'class midi::MidiInterface<bleMidi::BLEMIDI_TransportbleMidi::BLEMIDI_ESP32,

:(
How can I achieve to use that variable?
Thanks!

[rigr]

Thank you very much. This worked perfectly!