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Through his resource-saving conception, a MQTT client can be ran on any devices. Basically over every device, which can communicate via TCP/IP and interpret MQTT. In example, it goes from a simply full-automatic coffee machine to a complex server system or a central warning system.

 

 

MQTT clients will be divided in Publisher and Subscriber, but a client can be both roles at the same time.

 

 

Publisher

 

Clients, which can send messages to a Topic, will be designated as Publisher.

 

 

Subscriber

 

The so-called Subscriber is a client, that subscribes a Topic and receives corresponding news.