Outdated documentation
You are reading outdated documentation. This page documents ChirpStack v3. ChirpStack v4 is the latest version.
MQTT
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.
Architecture
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.