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Generally, MQTT (Message Queue Telemetry Transport) is a standardized message protocol by the OASIS (Organization for the Advancement of Structured Information Standards).

 

Technically speaking, MQTT is a Broker-Client-Architecture, which in combination with the Publisher-Subscriber-Principe, allows the communication with each other. The MQTT construct consists of the components: MQTT-Broker, at least one MQTT client, which acts as Publisher and one MQTT client as Subscriber, that subscribes to a so-called Topic.