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The MQTT backend is the default backend to communicate with the LoRa® gateways. As round-robin message delivery is not possible with (all) MQTT brokers, this backend implements its own de-duplication, to assure that a gateway event is only handled once.



Note: In the graph above, the ChirpStack Gateway Bridge is installed on the gateway. It is also possible to install the ChirpStack Gateway Bridge in the cloud.