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sudo npm install foreman -g
npm install foreman -g

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web: node app.js

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/**
 * Module dependencies.
 */

var express = require('express')
  , routes = require('./routes')
  , http = require('http')
  , path = require('path');

var app = express();

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/**
 * Serial Port Setup.
 */

var portName = '/dev/ttyAMA0'; //This is the standard Raspberry Pi Serial port

var readData = ''; //Array to hold the values read in from the port

var sp = new serialport(portName, {
  baudRate: 9600,

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serialport = require("serialport").SerialPort;

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/**
 * Server Code
 */

var server = http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});

var io = require('socket.io').listen(server);

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io.sockets.on('connection', function(socket){
  console.log("Socket connected"); 
  socket.emit('connected', 123);</pre>

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io.sockets.on('connection', function(socket){
  console.log("Socket connected"); 
  socket.emit('connected', 123);

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/*
 * GET home page.
 */
var fs = require('fs')

exports.index = function(req, res){
  res.writeHead(200, {'Content-Type': 'text/html'});
  var contents = fs.readFileSync("./public/index.html", "UTF-8");
  res.end(contents);
//  res.render('index');

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    var socket = io.connect('http://your ip address here..');

    socket.on('connected', function(data) {
      console.log('Connected, this is what I received : ', data);
      //you could then emit something here for the server to receive like socket.emit("blah", "helloworld") -hello world is a string of data you are passing the sever here..
    });