MQTT is a client-server architecture of publish / subscribe messaging protocol mode. Its design is lightweight, open
place, simple, standardized and easy to implement. These features make it for many scenes are good choices, especially for
limited environment such as a machine to machine communications ( the M2M ) and physical networking environment ( the IoT ).
1. This is an established protocol in TCP / IP on the basis of similar agreements as well as things like CoAP.
2. This is a subscription-based protocol and published ( SUBSCRIBE - subscribe to topics / PUBLISH - news release ).
3. In fact, the internal mechanism of the agreement no need to get to the bottom, as long as the current run up to make MQTT.
Interested students can download MQTT protocol document