led demo sequence example

led-demo-sequence.js

var five = require("johnny-five"),
  board = new five.Board(),
  led;


var demoSequence = [{
  method: "pulse",
  args: [1000],
  duration: 5000
}, {
  method: "strobe",
  args: [500],
  duration: 3000
}, {
  method: "fadeIn",
  args: [
    2000,
    function(){ console.log("fadeIn complete!")}
  ],
  duration: 2500
}, {
  method: "fadeOut",
  args: [
    5000,
    function(){ console.log("fadeOut complete!")}
  ],
  duration: 5500
}, {
  method: "brightness",
  args: [10],
  duration: 3000
}, {
  method: "off"
}];


// Execute a method in the demo sequence
function execute(step){
  
  var method = demoSequence[step].method;
  var args = demoSequence[step].args;
  var duration = demoSequence[step].duration || 3000;

  // Just print out what we're executing
  console.log( "led." + method + "("+ ( args ? args.join() : "" ) + ")" );

  // Make the actual call to the LED
  five.Led.prototype[method].apply( led, args );

  // Increment the step
  step++;
  if(step == demoSequence.length){
    // We're done!
    process.exit(0);
  }

  // Recursively call the next step after specified duration
  board.wait(duration,function(){
    execute(step);
  });

}


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

  // Defaults to pin 11 (must be PWM)
  led = new five.Led(process.argv[2] || 11);

  // Kick off the first step
  execute(0);

});

// Recursively call the next step after specified duration

This is mostly a nit-pick: this isn't actually a recursive call since execute is not actually the function that makes the call to itself, the callback to board.wait owns that. You should change this to something like:

"Schedule the next demo to be called from a later execution turn"