Message Queuing Telemetry Transport (MQTT) Protocol

Message Queuing Telemetry Transport (MQTT) Protocol sits on top of the TCP/IP protocol and is used for messaging services using a broker. It is often wrongly said that Message Queuing Telemetry Transport (MQTT) Protocol is a Protocol of Internet of Things – not really, MQTT is used by Facebook uses for their Mobile App’s Chat service. This Protocol falls among the major Protocols Related to Internet of Things (IoT), but itself is not a defining protocol of IoT.

 

Basics About Message Queuing Telemetry Transport (MQTT) Protocol

 

Right now, MQTT is at Version 3.1 (2013). The protocol was invented by Andy Stanford-Clerk and Arlen Nippe. As mentioned at the beginning, Message Queuing Telemetry Transport (MQTT) Protocol runs over TCP/IP. MQTT can transfer telemetry style data from sensor and actuator. This is the basic reason of making MQTT related to IoT.

Sensor can communicate with applications through a MQTT message broker even on narrow bandwidth. Message broker is an intermediary program which translates the language of a system from one globally acceptable language to another by way of a telecommunications medium. So the usages can be; for example, in health clinics where doctors can remotely monitor patients living few hundreds Miles away from them.

Advantages of MQTT include fast throughput and response time, lesser usage of bandwidth, multiple message subscription multiplexing over a single connection etceteras.

Over he last two tears the protocol itself has been moved to the open source community, so a significant growth in mobile applications can be seen. Message Queuing Telemetry Transport (MQTT) Protocol’s major plus points are the simplicity, a compact binary packet payload with no message properties, compressed headers. These features makes it a good fit for simple push messaging scenarios.

 

MQTT has it own website :

Broker means the Server side software, like from Apache :

Very simple example of PHP client can be :

Obviously, as can be expected; there are Javascript, Node.js, Ruby based client softwares too.

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