"use strict"; var Cylon = require("cylon"); Cylon.robot({ connections: { adaptor: { adaptor: "firmata", port: "/dev/ttyACM0" } }, devices: { servo: { driver: "servo", pin: 3, limits: { bottom: 20, top: 160 } } }, work: function(my) { var angle = 0, increment = 20; every((1).seconds(), function() { angle += increment; my.servo.angle(angle); console.log("Current Angle: " + (my.servo.currentAngle())); if ((angle === 0) || (angle === 180)) { increment = -increment; } }); } }).start();