{"id":31605,"date":"2021-12-16T07:21:00","date_gmt":"2021-12-16T07:21:00","guid":{"rendered":"http:\/\/randomnerdtutorials.com\/?p=31605"},"modified":"2021-12-16T15:41:46","modified_gmt":"2021-12-16T15:41:46","slug":"what-is-mqtt-and-how-it-works","status":"publish","type":"post","link":"https:\/\/randomnerdtutorials.com\/what-is-mqtt-and-how-it-works\/","title":{"rendered":"What is MQTT and How It Works"},"content":{"rendered":"\n

This article is an introduction to the MQTT protocol. MQTT stands for M<\/strong>essage Q<\/strong>ueuing T<\/strong>elemetry T<\/strong>ransport, a simple messaging protocol suitable for communication between IoT devices.<\/p>\n\n\n\n

\"What<\/figure>\n\n\n\n

Updated 16 December 2021<\/em><\/p>\n\n\n\n

What is MQTT?<\/h2>\n\n\n\n

MQTT stands for M<\/strong>essage Q<\/strong>ueuing T<\/strong>elemetry T<\/strong>ransport. MQTT is a simple messaging protocol, designed for constrained devices with low bandwidth. So, it\u2019s the perfect solution to exchange data between multiple IoT devices.<\/p>\n\n\n\n

MQTT communication works as a publish <\/em>and subscribe <\/em>system. Devices publish <\/em>messages on a specific topic. All devices that are subscribed <\/em>to that topic receive the message.<\/p>\n\n\n\n

\"MQTT<\/figure><\/div>\n\n\n\n

Its main applications include sending messages to control outputs, read and publish data from sensor nodes and much more.<\/p>\n\n\n\n

MQTT Basic Concepts<\/h2>\n\n\n\n

In MQTT there are a few basic concepts that you need to understand:<\/p>\n\n\n\n