johnny-five/eg/expander-PCF8574.js

The JavaScript Robotics and Hardware Programming Framework. Use with: Arduino (all models), Electric Imp, Beagle Bone, Intel Galileo & Edison, Linino One, Pinoccio, pcDuino3, Raspberry Pi, Particle/Spark Core & Photon, Tessel 2, TI Launchpad and more!

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

board.on("ready", function() {
  var virtual = new five.Board.Virtual(
    new five.Expander("PCF8574")
  );

  var leds = new five.Leds(
    Array.from({ length: 8 }, function(_, i) {
      return new five.Led({ pin: i, board: virtual });
    })
  );

  leds.on();

  this.repl.inject({
    leds: leds
  });
});