Controlling robots using javascript
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Sudar Muthu discusses controlling robots using JavaScript in conjunction with Arduino, primarily utilizing the node-serialport library for communication. He highlights various techniques for interfacing, including Bluetooth connections and sensor data readings, while demonstrating practical coding examples. The presentation aims to engage software developers to explore hardware through accessible tools and frameworks like Johnny-Five.
![Using Serial Connection
You need 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);
});](https://image.slidesharecdn.com/controlling-robots-using-javascript-121019113554-phpapp01/85/Controlling-robots-using-javascript-9-320.jpg)
![Using serial Bluetooth connection
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);
});](https://image.slidesharecdn.com/controlling-robots-using-javascript-121019113554-phpapp01/85/Controlling-robots-using-javascript-17-320.jpg)
Controlling robots using javascript
- 1. Controlling robots using JavaScript 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 for a software hacker? Fun!
- 4. Let’s start with a demo Demo http://hardwarefun.com/projects/asimijs
- 5. Participate in the demo Visit http://hardwarefun.com:3000
- 6. Control the bot at stage http://hardwarefun.com/projects/asimijs #asimijs @hardwarefun
- 7. Arduino Visual Basic for hardware Includes both Hardware and software Photo credit Arduino team
- 8. Interfacing Arduino with JavaScript Using serial connection (node-serialport) Using abstraction (like johnny-five or duino) Using serial Bluetooth connection (asimijs)
- 9. Using Serial Connection You need 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 Build on 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
- 11. Demo Let there be LIGHT
- 12. 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); });
- 13. Hardware setup
- 14. Reading sensor data What you need? Any sensor and a LED
- 15. Reading sensor data var five = 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 }); });
- 16. Using serial Bluetooth connection 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 ;)
- 17. Using serial Bluetooth connection 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 demo worked 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