Cylon.js is a JavaScript framework for robotics, physical computing, and the Internet of Things (IoT).

It provides a simple, but powerful way to create solutions that incorporate multiple, different hardware devices concurrently.

Want to use Ruby on robots? Check out our sister project, Artoo.

Want to use Golang to power your robots? Check out our sister project, Gobot.

All you need to get started on a new robot is the cylon module:

npm install cylon

With the core module installed, now install the modules for whatever hardware support you need. For the Arduino + LED blink example, we'll need the firmata, gpio, and i2c modules:

npm install cylon-firmata cylon-gpio cylon-i2c

The below example connects to an Arduino over a serial connection, and blinks an LED once per second.

The example requires that the Arduino have the Firmata sketch installed; which can be obtained either through the Ardunio IDE or the gort arduino upload firmata command available in gort.

var Cylon = require('cylon');

// define the robot
var robot = Cylon.robot({
  // change the port to the correct one for your Arduino
  connections: {
    arduino: { adaptor: 'firmata', port: '/dev/ttyACM0' }
  },

  devices: {
    led: { driver: 'led', pin: 13 }
  },

  work: function(my) {
    every((1).second(), my.led.toggle);
  }
});

// connect to the Arduino and start working
robot.start();

var Cylon = require('cylon');

Cylon.robot({
  connections: {
    ardrone: { adaptor: 'ardrone', port: '192.168.1.1' }
  },

  devices: {
    drone: { driver: 'ardrone' }
  },

  work: function(my) {
    my.drone.takeoff();

    after((10).seconds(), my.drone.land);
    after((15).seconds(), my.drone.stop);
  }
}).start();

var Cylon = require('cylon');

Cylon.robot({
  connections: {
    digispark: { adaptor: 'digispark' },
    leapmotion: { adaptor: 'leapmotion' }
  },

  devices: {
    servo1: { driver: 'servo', pin: 0, connection: 'digispark' },
    servo2: { driver: 'servo', pin: 1, connection: 'digispark' },
    leapmotion: { driver: 'leapmotion', connection: 'leapmotion' }
  },

  work: function(my) {
    my.x = 90;
    my.z = 90;

    my.leapmotion.on('hand', function(hand) {
      my.x = hand.palmX.fromScale(-300, 300).toScale(30, 150);
      my.z = hand.palmZ.fromScale(-300, 300).toScale(30, 150);
    });

    every(100, function() {
      my.servo1.angle(my.x);
      my.servo2.angle(my.z);

      console.log(my.servo1.currentAngle() + ", " + my.servo2.currentAngle());
    });
  }
}).start();

To use the HTTP API plugin, first install it's NPM module:

$ npm install cylon-api-http

Then it can be used in scripts:

var Cylon = require('cylon');

// tell the HTTP API plugin to listen for requests at https://localhost:4000
Cylon.api("http", { port: 4000 });

var bots = [
  { port: '/dev/rfcomm0', name: 'Thelma' },
  { port: '/dev/rfcomm1', name: 'Louise' }
];

bots.forEach(function(bot) {
  Cylon.robot({
    name: bot.name,

    connections: {
      sphero: { adaptor: "sphero", port: bot.port }
    },

    devices: {
      sphero: { driver: "sphero" }
    },

    work: function(my) {
      every((1).second(), function() {
        console.log(my.name);
        my.sphero.setRandomColor();
        my.sphero.roll(60, Math.floor(Math.random() * 360));
      });
    }
  });
});

// start up all robots at once
Cylon.start();

For those more familiar with jQuery, D3, or other fluent-style JavaScript libraries, Cylon.JS also supports a chainable syntax:

var Cylon = require('cylon');

Cylon
  .robot()
  .connection('arduino', { adaptor: 'firmata', port: '/dev/ttyACM0' })
  .device('led', { driver: 'led', pin: 13 })
  .on('ready', function(bot) {
    setInterval(function() {
      bot.led.toggle();
    }, 1000);
  });

Cylon.start();

Cylon.js has an extensible syntax for connecting to multiple, different hardware devices. The following 36 platforms are currently supported:

Our implementation of GPIO (General Purpose Input/Output) allows for a shared set of drivers supporting a number of devices:

• GPIO <=> Drivers
  • Analog Sensor
  • Button
  • Continuous Servo
  • Direct Pin
  • IR Rangefinder
  • LED
  • MakeyButton
  • Maxbotix Ultrasonic Range Finder
  • Motor
  • RGB LED
  • Servo

Additionally, we also support a number of I2C (Inter-Integrated Circuit) devices through a shared cylon-i2c module:

• I2C <=> Drivers
  • BlinkM
  • BMP180
  • HMC6352 Digital Compass
  • LCD Display
  • LIDAR-Lite
  • LSM9DS0G 9 Degrees of Freedom IMU
  • LSM9DS0XM 9 Degrees of Freedom IMU
  • MPL115A2 Barometer/Thermometer
  • MPU6050 Triple Axis Accelerometer and Gyro
  • PCA9685 16-Channel 12-bit PWM/Servo Driver

In addition to our supported platforms, we have the following user contributed platforms:

We'll also have many more platforms and drivers coming soon, follow us on Twitter for updates.

Cylon.js can be run directly in-browser, using the browserify NPM module. You can also run it from withing a Chrome connected app, or a PhoneGap mobile app.

For more info on browser support, and for help with different configurations, you can find more info in our docs.

Cylon.js has support for different API plugins that can be used to interact with your robots remotely. At this time we have support for http/https, mqtt, and socket.io with more coming in the near future.

To use an API plugin, install it alongside Cylon:

$ npm install cylon-api-http cylon-api-socketio

Then, all you need to do is call Cylon#api in your robot's script:

var Cylon = require("cylon");

// For http
Cylon.api('http');

// Or for Socket.io
Cylon.api('socketio');

Then visit https://localhost:3000/ and you are ready to control your robots from a web browser!

You can check out more information on the Cylon API in the docs here.

Cylon uses the Gort http://gort.io Command Line Interface (CLI) so you can access important features right from the command line. We call it "RobotOps", aka "DevOps For Robotics". You can scan, connect, update device firmware, and more!

Cylon also has its own CLI to generate new robots, adaptors, and drivers. You can check it out at https://github.com/hybridgroup/cylon-cli.

We're busy adding documentation to our website, check it out at cylonjs.com/documentation.

If you want to help with documentation, you can find the code for our website at on the https://github.com/hybridgroup/cylon-site.

• All patches must be provided under the Apache 2.0 License
• Please use the -s option in git to "sign off" that the commit is your work and you are providing it under the Apache 2.0 License
• Submit a Github Pull Request to the appropriate branch and ideally discuss the changes with us in IRC.
• We will look at the patch, test it out, and give you feedback.
• Avoid doing minor whitespace changes, renamings, etc. along with merged content. These will be done by the maintainers from time to time but they can complicate merges and should be done seperately.
• Take care to maintain the existing coding style.
• Add unit tests for any new or changed functionality & lint and test your code using make test and make lint.
• All pull requests should be "fast forward"
  • If there are commits after yours use “git rebase -i <new_head_branch>”
  • If you have local changes you may need to use “git stash”
  • For git help see progit which is an awesome (and free) book on git

Copyright (c) 2013-2015 The Hybrid Group. Licensed under the Apache 2.0 license.