mqttConnection.js

   var robuino_operador = "";
   var robuino_local = "jarduino_2c72";
   var host = 'broker.mqttdashboard.com';   // hostname or IP address
   var path = "/ws";
   var port = 8000;

   function MQTTconnect() {
      if (mqttConnected) {
         mqttConnected = false;
         console.info("already connected !!");
         //~ mqtt.disconnect();
         return;
      }
      if (typeof path == "undefined") {
         path = '/ws';
      }
      mqtt = new Paho.MQTT.Client(
         host,
         port,
         path,
         robuino_local + parseInt(Math.random() * 100, 10)
      );
      var options = {
         timeout: 3,
         useSSL: useTLS,
         cleanSession: cleansession,
         onSuccess: onConnect,
         onFailure: function (message) {
             $('#status').val("Connection failed: " + message.errorMessage + "Retrying");
             setTimeout(MQTTconnect, reconnectTimeout);
         }
      };

      mqtt.onConnectionLost = onConnectionLost;
      mqtt.onMessageArrived = onMessageArrived;

      if (username != null) {
         options.userName = username;
         options.password = password;
      }
      var logx = "Host="+ host + ", port=" + port + ", path=" + path + " TLS = " + useTLS + " username=" + username + " password=" + password;
      console.log(logx);
      mqtt.connect(options);
   }