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

board.on("ready", function() {
  var events = [];
  var strobe = new five.Pin(13);

  temporal.loop(500, function(loop) {
    strobe[loop.called % 2 === 0 ? "high" : "low"]();
  });


  // Pin emits "high" and "low" events, whether it's
  // input or output.
  ["high", "low"].forEach(function(state) {
    strobe.on(state, function() {
      if (events.indexOf(state) === -1) {
        console.log("Event emitted for:", state, "on", this.addr);
        events.push(state);
      }
    });
  });

  var analog = new five.Pin("A0");

  // Query the analog pin for its current state.
  analog.query(function(state) {
    console.log(state);
  });
});