/*
MIDI note on messages with variable velocity
By Amanda Ghassaei
July 2012
https://www.instructables.com/id/Send-and-Receive-MIDI-with-Arduino/

 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.

*/

#include <HardwareSerial.h>

HardwareSerial mySerial(1);

int noteON = 144;//144 = 10010000 in binary, note on command

void setup() {
  //  Set MIDI baud rate:
  Serial.begin(115200);
  mySerial.begin(115200, SERIAL_8N1, 26, 27);

  delay(1000);

  mySerial.println("--------STARTING---------");
}

void loop() {
  int velocity = 20;//set velocity to 20

    MIDImessage(noteON, 50, velocity);//turn note on
    velocity += 5;//ad 5 to current velocity value


  mySerial.println("LOOPING");

  while(Serial.available()>0)
    {
      byte incomingByte = Serial.read();

      mySerial.print("I received: ");
      mySerial.println(incomingByte, DEC);
    };

    delay(100);
}

//send MIDI message
void MIDImessage(int command, int MIDInote, int MIDIvelocity) {
  Serial.write(command);//send note on or note off command
  //Serial.write(MIDInote);//send pitch data
  Serial.write(MIDIvelocity);//send velocity data
}