Serveur

var SerialPort = require("serialport").SerialPort;

var serialPort = new SerialPort('.COM4', {baudrate: 9600}, true);

var http = require('http');
var fs = require('fs');

// Chargement du fichier index.html affiché au client
var server = http.createServer(function(req, res) {
    fs.readFile('./index.html', 'utf-8', function(error, content) {
        res.writeHead(200, {"Content-Type": "text/html"});
        res.end(content);
    });
});

serialPort.on ('open', function () {
    serialPort.write(0x05);
    serialPort.on ('data', function( data ) {
        mess = "P = " + data.toString()+" W";
    });
});

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

// Quand un client se connecte, on le note dans la console
io.sockets.on('connection', function (socket) {
    socket.emit('message',mess);
});


server.listen(8080);