Infinity loop...

[RaphaelDives]

Hello!
I'm trying to realize a Wireless MIDI connection over ESPNow with USB Support...

Therefore I'm initializing three MIDI Instances (USB, UART and ESP(Now)) and created this loop
(I used the MIDI-Merger as example):

  //Recieve MIDI from ESP and send to UART
  if (MIDI_ESP.read()) 
  {
    digitalWrite(15, HIGH);
    MIDI_UART.send(
      MIDI_ESP.getType(),
      MIDI_ESP.getData1(),
      MIDI_ESP.getData2(),
      MIDI_ESP.getChannel()
    );
    digitalWrite(15, LOW);
  }

  //Receive MIDI from USB and send to UART and ESP
  if (MIDI_USB.read())
  {
    digitalWrite(15, HIGH);
    
    MIDI_ESP.send(
      MIDI_USB.getType(),
      MIDI_USB.getData1(),
      MIDI_USB.getData2(),
      MIDI_USB.getChannel()
    );
    
    MIDI_UART.send(
      MIDI_USB.getType(),
      MIDI_USB.getData1(),
      MIDI_USB.getData2(),
      MIDI_USB.getChannel()
    );
    digitalWrite(15, LOW);
  }
  
  //Receive MIDI from UART and send to ESP
  if (MIDI_UART.read())
  {
    digitalWrite(15, HIGH);
    MIDI_ESP.send(
      MIDI_UART.getType(),
      MIDI_UART.getData1(),
      MIDI_UART.getData2(),
      MIDI_UART.getChannel()
    );
    digitalWrite(15, LOW);
  }

When I upload this code to two ESP32 (Lolin S2 Mini) and send one note over USB or UART then it seems like some feedback loop occurs (with both LED's flashing wildly) that will only stop, by resetting one of both ESP's.
It looks like sending an output is recognized as input...

Is the code correct? Especially in the middle part with the USB.read?
Anyone any clues what might be wrong here?

Thank you very much!!
Raphael

[RaphaelDives]

Hey,
found the solution....
Like in #351
Had to disable MidiThru AFTER the begin() function.
(Since it was enabled with the ESP Serial Class...)

Cheers
Raphael