johnny-five/eg/led-matrix.js

The JavaScript Robotics and Hardware Programming Framework. Use with: Arduino (all models), Electric Imp, Beagle Bone, Intel Galileo & Edison, Linino One, Pinoccio, Raspberry Pi, Spark Core, TI Launchpad and more!

var five = require("../lib/johnny-five");
var board = new five.Board();

board.on("ready", function() {

  var heart = [
    "01100110",
    "10011001",
    "10000001",
    "10000001",
    "01000010",
    "00100100",
    "00011000",
    "00000000"
  ];

  var matrix = new five.Led.Matrix({
    pins: {
      data: 2,
      clock: 3,
      cs: 4
    }
  });

  matrix.on();

  var msg = "johnny-five".split("");

  // Display each letter for 1 second
  function next() {
    var c;

    if (c = msg.shift()) {
      matrix.draw(c);
      setTimeout(next, 1000);
    }
  }

  next();

  this.repl.inject({
    matrix: matrix,
    // Type "heart()" in the REPL to
    // display a heart!
    heart: function() {
      matrix.draw(heart);
    }
  });
});