[BT] BM2 Tracker addition and Discovery adjustment (#1765)

* BM2 as Tracker additions

* BM2 discovery update

docs/use/ble.md

@@ -46,7 +46,7 @@ Once the data has been transmitted to the MQTT broker, it can be easily integrat
 Examples of compatible sensors among [our list](https://decoder.theengs.io/devices/devices_by_brand.html: Mi Flora, Mi jia, LYWDS02, LYWSD03MMC, ClearGrass, Mi scale, iBBQ, TPMS
 
 ## Receiving signals from BLE tracker devices for Presence detection
-The gateway can detect the BLE trackers from Tile, NUT, TAGIT, ITAG, MiBand, Amazfit and RuuviTag and create automatically a device tracker entity following the Home Assistant discovery convention (if the auto discovery is activated).
+The gateway can detect BLE trackers from Tile, Nut, TagIt and iTag, as well as other devices with additional properties decoding like Mi Band, Amazfit, RuuviTag and others indicated as Presence Trackers in the [compatible BLE devices list](https://decoder.theengs.io/devices/devices.html), and automatically creates a device tracker entity following the Home Assistant discovery convention (if auto discovery is activated).
 To do this activate the "BT: Publish HASS presence" switch in your controller or send the following MQTT command to your broker:
 `mosquitto_pub -t home/OpenMQTTGateway/commands/MQTTtoBT/config -m '{"hasspresence":true}'`