MQ Telemetry Transport (MQTT)

The MQ Telemetry Transport (MQTT) is a lightweight protocol designed for devices in remote locations with constrained network resources in the IoT domain.


The MQTT protocol defines two types of network entities:

  • A message broker and a number of clients. An MQTT broker is a server that receives all messages from the clients and then routes the messages to the appropriate destination clients.
  • An MQTT client is any device (from a micro controller up to a fully-fledged server) that runs an MQTT library and connects to an MQTT broker over a network.

The default unencrypted MQTT port is 1883. The encrypted port is 8883


Message Commands:



MQTT Protocol - OASIS MQTT 5.0

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