SysEx-Send-Receive.ino

SysEx-Send-Receive

Example showing how to send and receive MIDI System Exclusive messages.

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AVR, AVR USB, Nano Every, Due, Nano 33 IoT, Nano 33 BLE, UNO R4, Pi Pico, Teensy 3.x, ESP32, ESP8266

 
#include <Control_Surface.h>
 
// Instantiate the MIDI over USB interface
USBMIDI_Interface midi;
 
// Custom MIDI callback that prints incoming SysEx messages.
struct MyMIDI_Callbacks : MIDI_Callbacks {
 
  // This callback function is called when a SysEx message is received.
  void onSysExMessage(MIDI_Interface &, SysExMessage sysex) override {
    // Print the message
    Serial << F("Received SysEx message: ")         //
           << AH::HexDump(sysex.data, sysex.length) //
           << F(" on cable ") << sysex.cable.getOneBased() << endl;
  }
 
} callback {};
 
// Push button connected between pin 2 and ground.
// SysEx message is sent when pressed.
Button pushbutton {2};
 
void setup() {
  Serial.begin(115200);
  pushbutton.begin(); // enables internal pull-up
  midi.begin();
  midi.setCallbacks(callback);
}
 
void loop() {
  // Send a SysEx message when the push button is pressed
  uint8_t sysex[] {0xF0, 0x11, 0x22, 0x33, 0xF7};
  if (pushbutton.update() == Button::Falling)
    midi.sendSysEx(sysex);
 
  // Read incoming MIDI data and call the callback if a new
  // SysEx message has been received.
  midi.update();
}