Johnny Five app

index.js

const five = require('johnny-five');
var board = new five.Board();

// The board's pins will not be accessible until
// the board has reported that it is ready
const LIGHTS = [10, 11, 12, 13];
const BUTTONS = [5, 4, 3, 2];
const NOTES = ['C', 'E', 'G', 'B'];
const PIEZO = 6;

let holdtime = 250;

board.on('ready', function() {
  console.log('Ready!');

  const buttons = initButtons();
  const speaker = new five.Piezo(PIEZO);
  // const potentiometer = new five.Sensor({
  //   pin: 'A5',
  //   freq: 1000,
  // });

  setupButtons(buttons, speaker);
  // setupPotentiometer(potentiometer, buttons);

  const deathButton = new five.Button(7);
  setupDeathButton(deathButton, speaker);

  speaker.play({
    // song is composed by a string of notes
    // a default beat is set, and the default octave is used
    // any invalid note is read as "no note"
    song: 'C D F D A - A A A A G G G G - - C D F D G - G G G G F F F F - -',
    beats: 1 / 4,
    tempo: 100,
  });

  this.repl.inject({
    buttons: buttons,
  });
});

function initButtons() {
  return BUTTONS.map(
    (pin, i) =>
      new five.Button({
        pin: pin,
        holdtime: holdtime,
        custom: {
          light: new five.Led(LIGHTS[i]),
        },
      }),
  );
}

function setupButtons(buttons, speaker) {
  buttons.map((button, i) => {
    button.on('down', function() {
      button.custom.light.on();
      speaker.play({ song: NOTES[i], beats: 1 });
      console.log(NOTES[i], 'full beat');
    });

    button.on('hold', function() {
      speaker.play({ song: NOTES[i], beats: 1 / 8 });
      console.log(NOTES[i], 'eighth beat');
    });

    button.on('up', function() {
      button.custom.light.off();
    });
  });
}

function setupDeathButton(button, speaker) {
  button.on('down', function() {
    speaker.play({
      song: [
        ['E', 1],
        ['', 1 / 4],
        ['E', 1],
        ['', 1 / 4],
        ['E', 1],
        ['', 1 / 4],
        ['C', 3],
        ['D', 1],
        ['', 1 / 4],
        ['D', 1],
        ['', 1 / 4],
        ['D', 1],
        ['', 1 / 4],
        ['B3', 3],
      ],
    });
    console.log('Playing death sound');
  });
}