This MQTT-based protocol with JSON payload is used by Teltonika Gateway Wi-Fi devices to effectively parse the data about anchors and assets in Wirepas Mesh network.
To connect your Gateway Wi-Fi, you need to create teltonika-gateway-wifi-mqtt channel, and use its URI and port in the device's Config->MQTT set up and select JSON as Data encoding.
There are 3 device types available for the protocol:
Wi-Fi Gateway device type is identified by the serial number (e.g. BTGW-00000000deadbeef) and stores one valuable parameter event.payload: it is the copy of JSON object with all the data received as MQTT payload. It is used for debug purposes.
Asset device type is the virtual representation of the moving asset, it is identified by the 10 digit serial number (e.g. 1234567890) and stores the valuable array parameter "anchors" that looks like [{"id":"1234567","rssi":-104},{"id":"7654321","rssi":-73}] that displays the list of anchors seen by the asset and the signal strength to it. Asset data is transmitted to the gateway over the anchor's mesh network, thus the asset also has parameters the signal.hop.count (number of the nodes in the Mesh network used to transfer the signal to the gateway) and signal.travel.time, together with the standard parameters like message.seqnum and battery.voltage.
Anchor device type is used to track the anchor devices to effectively answer the question "which assets were seen by the specific anchor device". It is identified by the 7-digit identifier (e.g. 1234567) and it stores the array parameter "assets" that looks like [{"id":"1234567890","rssi":-104}]