Hardware for JavaScript Developers
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This document discusses using JavaScript to program hardware devices. It provides an overview of electronic prototyping platforms like Arduino and frameworks like Johnny-Five that allow controlling hardware from JavaScript code. Johnny-Five works with many boards and allows interfacing with components like LEDs, sensors, and motors. Examples are shown of blinking an LED and building a claw controller using a servo motor and joystick. The talk aims to introduce JavaScript developers to hardware programming using approaches that don't require learning a new language like C.
![var five = require("johnny-five");
five.Board().on("ready", function() {
var claw, joystick;
// Claw servo controller
claw = new five.Servo(9);
// Joystick controller
joystick = new five.Joystick({
// x, y (vertical, horizontal)
pins: [ "A0", "A1" ]
});
!
// Center the claw servo to match the joystick deadzone.
claw.center();
!
// When the joystick axis are moved...
joystick.on("axismove", function() {
// Open & close the claw by setting degrees according
// to Y position value of joystick.
claw.move( Math.ceil(180 * this.fixed.y) );
});
});
https://dl.dropboxusercontent.com/u/3531958/nodeconf/joystick-claw.mp4](https://image.slidesharecdn.com/hdforjd1-140928164348-phpapp01/85/Hardware-for-JavaScript-Developers-13-320.jpg)
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Hardware for JavaScript Developers
- 1. Hardware Development for JavaScript Developers Tarık Keleştemur" • github/tkelestemur! • twitter/tarikkelestemur! • kelestemur.com
- 2. About Me • Electronics Engineering Student at TOBB ETU #3 • Co-Founder at GMTLabs.com • Working on embedded sys. and robotics ! ! more info : kelestemur.com
- 3. Agenda • A Brief History of Electronic Prototyping • It's all about C. How JS involved ? - Main Concept • JS Hardware Frameworks • Demonstration ! ! !
- 4. Hardware Prototyping • Texas Instruments • IBM • Atmel • Microchip ! ! ! ! !
- 5. Electronic for Everyone : Arduino • 16MHz micro-controller • Easy programming with Wiring • Open Source! • Great for driving motors, reading sensors BUILDING ROBOTS! ! !
- 6. Electronic for Everyone : Other ! !
- 7. The Problem • Micro-controllers are running at low speeds. • They are not capable of handling high-level jobs such as math, media processing • They are programmed with C language. • C does not have awesome JavaScript libraries. !
- 8. The Solution • Using JavaScript as controller software of these hardwares. ! ! ! NODEJS + HW Framework uController + Special Firmware Serial Comm • Serial communication is made by a node package called serialport • Special Firmware let you control your hardware over serial comminaciton with JavaScript. We don't write any C code :)
- 9. Hardware Frameworks ! ! ! ! ! Johnny-Five Cylon.JS
- 10. Johnny-Five • Compitable with almost every electronic board : Beagle Bone, Intel Galileo,Pinoccio,Raspberry Pi, Spark Core, Arduino of course. • Uses node-serialport package by Chris Williams • Has a large community : NodeBots, NodeCopter, NodeRocket !
- 11. Johnny-Five • Accelerometer, Button, Compass, Led, Joystick, Motor, (Ultrasonic) Ping, Proximity IR, Range IR, Sensor, Servo, Sonar • http://jsfiddle.net/rwaldron/XMsGQ/show/light/
- 12. Johnny-Five Examples var five = require("johnny-five"); five.Board().on("ready", function() { (new five.Led(13)).strobe(100); }); • It says arduino to blink the led atteched to pin13 in every 100 ms over serial port.
- 13. var five = require("johnny-five"); five.Board().on("ready", function() { var claw, joystick; // Claw servo controller claw = new five.Servo(9); // Joystick controller joystick = new five.Joystick({ // x, y (vertical, horizontal) pins: [ "A0", "A1" ] }); ! // Center the claw servo to match the joystick deadzone. claw.center(); ! // When the joystick axis are moved... joystick.on("axismove", function() { // Open & close the claw by setting degrees according // to Y position value of joystick. claw.move( Math.ceil(180 * this.fixed.y) ); }); }); https://dl.dropboxusercontent.com/u/3531958/nodeconf/joystick-claw.mp4
- 14. Demos • Arduino : Blinking LED, Servo, Reading Sensor Data • Spark Core : Internet of Things Example ! !
- 15. Thank You! Questions ? • Tarık Keleştemur • kelestemur.com • twitter/tarikkelestemur • github/tkelestemur • [email protected] ! !