const int N_BUTTONS = 3;


int buttonPin[N_BUTTONS] = {2,3,4};

int buttonState[N_BUTTONS] = {0};
int buttonPState[N_BUTTONS] = {0};

 //previous state of the button

unsigned long lastDebounceTime[N_BUTTONS] = {0}; // millis
unsigned long debounceTimer[N_BUTTONS] = {0};
int debounceDelay = 10;


void setup() {
  Serial.begin(9600);

  for (int i = 0; i < N_BUTTONS; i++) {

   pinMode(buttonPin[i], INPUT_PULLUP); 
  }
}

void loop() {
  
  for (int i = 0; i < N_BUTTONS; i++ ){

    buttonState[i] = digitalRead(buttonPin[i]);
    
    debounceTimer[i] = millis() - lastDebounceTime[i];

    if (debounceTimer[i] > debounceDelay) {

      if (buttonState[i] != buttonPState[i]) {

        lastDebounceTime[i] = millis();

        if(buttonState[i] == LOW) {


          //noteOn(BUTTON_CH, buttonNote[i],127);
         // MidiUSB.flush();

      
      
          //Serial.print("button");
          //Serial.print(i);
          //Serial.print(" ");
          Serial.println("1");
        } else {

        

        //noteOn(BUTTON_CH,buttonNote[i], 0);

          //Serial.print("button");
          //Serial.print(i);
          //Serial.print(" ");
          //Serial.println("1");
        }



        buttonPState[i] = buttonState[i];
      }
    }
  }
}