MQTT

kc@example.com (kc kim) — Tue, 06 Jul 2021 10:30:53 +0900

What Is a Message Queue?

A message queue, or MQ, is a communication method used when processes or program instances exchange data with one another.

What Is MQTT (Message Queue for Telemetry Transport)?

MQTT stands for Message Queue for Telemetry Transport.
It is a lightweight protocol developed for M2M (machine-to-machine) and IoT (Internet of Things).
It was developed by IBM in 1999 as a large-scale message delivery protocol designed to operate under limited computing power and network connectivity.
It is optimized for sending and receiving small amounts of data from devices and for unstable network environments such as 3G.

Sites

Official site
- http://mqtt.org
Versions
- MQTT Version 3.1.1 2015
- MQTT Version 5.0 2019
GitHub and wiki
- https://github.com/mqtt
- https://github.com/mqtt/mqtt.github.io/wiki

Publish/Subscribe Structure

MQTT’s biggest feature is its publish/subscribe structure. Publishers and subscribers communicate through an MQTT broker by using specific topics. Figure 2 shows the basic structure in which publishers and subscribers communicate. If one or more subscribers have subscribed to a specific topic, data published to that topic by a publisher is delivered to the subscribers through the MQTT broker.

publisher
- Sends messages to the broker.
subscriber
- Receives messages from the broker.
broker
- Delivers messages to subscribers registered for a topic.

devkuma – MQTT

MQTT

What Is a Message Queue?

What Is MQTT (Message Queue for Telemetry Transport)?

Sites

Publish/Subscribe Structure

References