ema_srv.js

var net = require('net');

var HOST = '127.0.0.1';
var PORT = 8888;

function rand(i) {
  return parseInt((Math.random() * 10000) % i);
}

net.createServer(function(sock) {

    // We have a connection - a socket object is assigned to the connection automatically
    console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);

    // Add a 'data' event handler to this instance of socket
    sock.on('data', function(data) {
      console.log('RCV Data : ' + sock.remoteAddress + ': ' + data.toString().trim());
      var data = data.toString().split("\n");
      for(var i = 0; i < data.length; i++) {
        var cmd = data[i].trim();
        switch(cmd) {
          case 'DETECT':
            var out = '';
            out += Math.random() * 10 > 5 ? ' AVG' : '';
            out += Math.random() * 10 > 5 ? ' AVD' : '';
            out += Math.random() * 10 > 5 ? ' ARG' : '';
            out += Math.random() * 10 > 5 ? ' ARD' : '';
            sock.write("DETECT"+out+"\n");
            console.log("DETECT"+out+"\n");
            break;
          case 'BOUSSOLE':
            var out = parseInt(Math.random() * 360);
            sock.write("BOUSSOLE "+out+"\n");
            console.log("BOUSSOLE "+out+"\n");
            break
          case 'DIST_US':
            var out = 'DIST_US ' + parseInt(Math.random() * 50) + ' ' + parseInt(Math.random() * 50) + ' ' + parseInt(Math.random() * 50) + "\n";
            sock.write(out);
            console.log(out);
            break;
          case 'POS_GPS':
            var lng = parseInt(Math.random() * 360) + '°' + parseInt(Math.random() * 60) + "'" + parseInt(Math.random() * 60) + '"';
            var lat = parseInt(Math.random() * 360) + '°' + parseInt(Math.random() * 60) + "'" + parseInt(Math.random() * 60) + '"';
            sock.write("POS_GPS " + lat + " " + lng +"\n");
            console.log("POS_GPS " + lat + " " + lng +"\n");
            break;
          case 'ETAT_BATT':
            var out = 'ETAT_BATT ' + parseInt(Math.random() * 24) + "\n";
            sock.write(out);
            console.log(out);
            break;
          default:
            sock.write("TRAME_OK\n");
            break;
        }
      }
      sock.write(data.toString().trim());

    });

    // Add a 'close' event handler to this instance of socket
    sock.on('close', function(data) {
      console.log('CLOSED:');
    });

}).listen(PORT, HOST);

console.log('Server listening on ' + HOST +':'+ PORT);