johnny-five/util/servo-lab.js

Firmata based Arduino Programming Framework.

var five = require("../lib/johnny-five.js"),
    args, pins, ranges;

/**
 * This program is useful for manual servo administration.
 *
 * ex. node eg/servo-lab.js [ pin list ]
 *
 *     To setup servos on pins 10 and 11:
 *
 *     node eg/servo-lab.js 10 11
 *
 *     To setup servos on pins 10 and 11 with custom ranges:
 *
 *     node eg/servo-lab.js 10:10:170 11
 *
 *     Note: Ranges default to 0-180
 *
 */

args = process.argv.slice(2);

pins = [];
ranges = [];

args.forEach(function( val ) {
  var vals = val.split(":").map(function(v) { return +v; });

  pins.push( vals[0] );

  ranges.push(
    vals.length === 3 ?
    vals.slice(1) :
    [ 0, 180 ]
  );
});

(new five.Board()).on("ready", function() {
  var servos;

  // With each provided pin number, create a servo instance
  pins.forEach(function( pin, k ) {
    new five.Servo({
      pin: pin,
      range: ranges[ k ]
    });
  }, this);

  servos = new five.Servos();

  servos.center();

  // Inject a Servo Array into the REPL as "s"
  this.repl.inject({
    s: servos
  });
});