1. What is MQTT?
  2. The MQTT Standard
  3. References

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What is MQTT?

MQTT stands for MQ Telemetry Transport. It is a publish/subscribe, extremely simple and lightweight messaging protocol, designed for constrained devices and low-bandwidth, high-latency or unreliable networks. The design principles are to minimise network bandwidth and device resource requirements whilst also attempting to ensure reliability and some degree of assurance of delivery. These principles also turn out to make the protocol ideal of the emerging “machine-to-machine” (M2M) or Internet of Things world of connected devices, and for mobile applications where bandw./idth and battery power are at a premium.


The MQTT Standard

MQTT Version 3.1.1 - OASIS Standard - 29 October 2014:




Beginners Guide To The MQTT Protocol:

5 Things to Know About MQTT – The Protocol for Internet of Things:

Home Assistant // MQTT:


Glenn Lyons VK4PK
Ver:gnl20190505 - pre published v0.9