I decided to move onto an ESP32. The ESP32 has bluetooth built in, and is a widely used device. This means I can easily steal code from others. Stealing is the only way things get done, anyone who says any different isn’t aware of their THEFT, or they got them big brains.

With the ESP32 breadboarded, I whipped up the following bit of code to handle what I need from the device.

#include <Arduino.h>
#include <BLEMidi.h>
#include <ezButton.h>
#define BUTTON_PIN1 16 // ESP32 pin 16 (RX2),connected to button
#define BUTTON_PIN2 17 // ESP32 pin 17 (TX2), connected to button 
#define BUTTON_PIN3 4 // ESP32 pin 4 (D4), connected to button

ezButton button1(BUTTON_PIN1); 
ezButton button2(BUTTON_PIN2);
ezButton button3(BUTTON_PIN3);
boolean connectedMsg = false;
void setup() {
Serial.begin(115200);
pinMode(BUTTON_PIN1, INPUT_PULLUP);
pinMode(BUTTON_PIN2, INPUT_PULLUP);
pinMode(BUTTON_PIN3, INPUT_PULLUP);
button1.setDebounceTime(50);
button2.setDebounceTime(50);
button3.setDebounceTime(50);
Serial.println("Initializing bluetooth");
BLEMidiServer.begin("Basic MIDI device");
Serial.println("Waiting for connections...");
//BLEMidiServer.enableDebugging(); // Uncomment for debugging
}
void loop() {
if(BLEMidiServer.isConnected()) { 
if (connectedMsg == false){
connectedMsg = true;
Serial.println("*****CONNECTED*****");
} 
button1.loop();
button2.loop();
button3.loop();
if (button1.isPressed()){
BLEMidiServer.programChange(0,0);
Serial.println("P1 CHANGE SENT");
}
if (button2.isPressed()){
BLEMidiServer.programChange(0,1);
Serial.println("P2 CHANGE SENT");
}
if (button3.isPressed()){
BLEMidiServer.programChange(0,2);
Serial.println("P3 CHANGE SENT");
}
}
}