tomatino_Server.js

/*
	serialServer.js
	a node.js app to read serial strings and send them to webSocket clients
	requires:
		* node.js (http://nodejs.org/)
		* express.js (http://expressjs.com/)
		* socket.io (http://socket.io/#how-to-use)
		* serialport.js (https://github.com/voodootikigod/node-serialport)
		
	Sourced from: https://github.com/tigoe/NetworkExamples/blob/master/nodeSerialServer/index.js

*/



var serialport = require("serialport"),		// include the serialport library
	SerialPort  = serialport.SerialPort,	   // make a local instance of serial
	express = require('express'),				   // make an instance of express
	open = require('open'),                   // used to open the browser
	url = 'http://localhost:8080';            // URL to open in the browser
 
var app = express(),								   // start Express framework
   server = require('http').createServer(app);		// start an HTTP server
  	io = require('socket.io').listen(server);		// listen for websocket requests

// third word of the command line is serial port name:
var portName = process.argv[2];				  
// print out the port you're listening on:
console.log("opening serial port: " + portName);	

// listen for incoming requests on the server:
server.listen(8080);								         
console.log("Listening for new clients on port 8080");
// open the app in a browser:
open(url);                   

// open the serial port:
var myPort = new SerialPort(portName, { 
	// look for return and newline at the end of each data packet:
	parser: serialport.parsers.readline("\r\n") 
});
  
// respond to web GET requests with the index.html page:
app.get('/', function (request, response) {
  response.sendfile(__dirname + '/tomatino_Listener.html');
});

// listen for new socket.io connections:
io.sockets.on('connection', function (socket) {
   // if there's a socket client, listen for new serial data:  
   myPort.on('data', function (data) {
      // for debugging, you should see this in Terminal:
      console.log(data);
      // send a serial event to the web client with the data:
      socket.emit('serialEvent', data);
	});
});