Javascript Doorbell

client.js

function getUuid() {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
    return v.toString(16);
  });
}
var deviceId = getUuid();
var wsOpen = false;
var ws;
function connect() {
  ws = new WebSocket('ws://192.168.2.100:8322');
  ws.onopen = () => {
    wsOpen = true;
  };
  ws.onclose = () => {
    wsOpen = false;
    connect();
  };
}
connect();
window.addEventListener('deviceproximity', function(e) {
  if (wsOpen) {
    ws.send(JSON.stringify({
      type: 'deviceproximity',
      deviceId: deviceId,
      value: e.value
    }));
  }
});

doorbell.js

var devices = {};
var audio = new Audio('http://www.soundjay.com/door/sounds/doorbell-6.mp3');
var ws = new WebSocket('ws://' + location.hostname + ':8322');

ws.onmessage = function(e){
  var data = e.data;
  if (typeof data === "string") data = JSON.parse(data);
  if(data & data.type === "deviceproximity"){
    if (!devices[data.deviceId]){
      audio.mozAudioChannelType = 'normal';
      audio.volume.normal = 15;

    }

    if (data.value <= 5){
      audio.play();
      console.log("activado");
    }

  }
};

index.js

var connect = require("connect");
var serveStatic = require("serve-static");

connect()
.use(serveStatic(__dirname))
.listen(8321, '0.0.0.0');

var ws = require("nodejs-websocket");

var server = ws.createServer(function(conn){
  console.log("new connection");
  conn.on("text", function(str){
    console.log("Received " + str);
    broadcast(str);
  });
  conn.on("close", function(code, reason){
    console.log("Connection closed");
  });
}).listen(8322, "0.0.0.0");

function broadcast(msg){
  server.connections.forEach(function(conn){
    conn.sendText(msg);
  });
}

console.log('listening on port ', 8321, 8322);