Controlling robots using javascript

Controlling robots using javascript

• 1.
  Controlling robots usingJavaScript Sudar Muthu (@sudarmuthu) Research Engineer, Yahoo! Labs http://hardwarefun.com http://github.com/sudar
• 2.
  Who am I? Research Engineer by profession  Creates robots as hobby  Prefers Arduino  Prefers JavaScript at work  Why not combine both of them?  .. and that’s what I am going to talk about today
• 3.
  Why hardware fora software hacker? Fun!
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  Let’s start witha demo Demo http://hardwarefun.com/projects/asimijs
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  Participate in thedemo  Visit http://hardwarefun.com:3000
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  Control the botat stage http://hardwarefun.com/projects/asimijs #asimijs @hardwarefun
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  Arduino  Visual Basicfor hardware  Includes both Hardware and software Photo credit Arduino team
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  Interfacing Arduino withJavaScript  Using serial connection (node-serialport)  Using abstraction (like johnny-five or duino)  Using serial Bluetooth connection (asimijs)
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  Using Serial Connection Youneed node-serialport - https://github.com/voodootikigod/node-serialport var SerialPort = require("serialport").SerialPort, arduino = new SerialPort("/dev/tty/ACM1"); // when data is received from arduino arduino.on("data", function (data) { arduino.write(new Buffer[data]); console.log("Got: " + data); }); // if there was any error arduino.on("error", function (data) { console.log("Error: " + data); });
• 10.
  Using Abstraction  Buildon top of node-serialport - https://github.com/voodootikigod/node-serialport  Options include Johnny-five - https://github.com/rwldrn/johnny-five and duino - https://github.com/ecto/duino  Load the firmdata program into Arduino  It provides the necessary abstraction  Write code using a node.js library  Profit 
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  Demo Let there beLIGHT
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  Code var five =require("johnny-five"), board = new five.Board(); board.on("ready", function() { // Create an Led on pin 13 (new five.Led(13)).strobe(1000); });
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  Hardware setup
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  Reading sensor data What you need? Any sensor and a LED
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  Reading sensor data varfive = require("johnny-five"), board, led, photoresistor; board = new five.Board(); board.on("ready", function() { // Create a new `photoresistor` hardware instance. photoresistor = new five.Sensor({pin: "A2”, freq: 250}); led = new five.Led(13); // "read" get the current reading from the photoresistor photoresistor.on("read", function( err, value ) { if (value > 50) { led.on(); } else { led.off(); } console.log( value, this.normalized ); }); // Inject the `sensor` hardware into the Repl instance's context; // allows direct command line access board.repl.inject({ pot: photoresistor }); });
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  Using serial Bluetoothconnection  Bluetooth shield gives wireless capability to Arduino  A Bluetooth connection appears as serial port in your computer  Using node-serialport you can talk wirelessly to Arduino  And that’s what I did for demo ;)
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  Using serial Bluetoothconnection var SerialPort = require("serialport").SerialPort, bt = new SerialPort("/dev/cu.FireFly-CCFA-SPP"); // when data is received from bluetooth bt.on("data", function (data) { bt.write(new Buffer[data]); console.log("Got: " + data); }); // error reading bluetooth serial port bt.on("error", function (data) { console.log("Error: " + data); });
• 18.
  How the demoworked Node.js Server Node Client Admin page User page User page User page
• 19.
  Links  AsimiJS –The demo that I showed initially http://hardwarefun.com/projects/asimijs  Asimi – A simple bot using Arduino http://hardwarefun.com/project/asimi  Getting started with hardware programming http://hardwarefun.com/tutorials/getting-started-with- hardware-programming  Getting started with Arduino http://hardwarefun.com/tutorials/getting-started-with-arduino- and-avr  Node-serialport https://github.com/voodootikigod/node- serialport  Johnny Five https://github.com/rwldrn/johnny-five
• 20.
  Questions Thank You Sudar Muthu(@sudarmuthu) http://hardwarefun.com http://gitbub.com/sudar