MQTT and QOS

MQTT and QOS

QoS stands for : Quality of service

There is 3 different QoS available for MQTT:


  • QoS level 0 : “At most once” - The message is send without acknowledgement

  • QoS level 1 : “At least once” - The message is send with acknowledgement

  • QoS level 2: “Exactly once” - The message is send with acknowledge (avoid message duplication mechanism)


Wattsense is at the QoS level 1.


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