MQTT mqttPub = createMQTTConnection("pub", true);
mqttPub.setUserName("admin");
mqttPub.setPassword("admin");
BlockingConnection connectionPub = mqttPub.blockingConnection();
connectionPub.connect();
connectionPub.publish("one", "test".getBytes(), QoS.AT_LEAST_ONCE, true);
MQTT mqttSub = createMQTTConnection("sub", true);
mqttSub.setUserName("user");