Communication between mobile devices and flight control boards can be achieved through Bluetooth, you can use mobile devices to set the parameters of the flight controller.APP currently only supports Bluetooth Low Energy Module. Not only for SpeedyBee Bluetooth Module, we can also try to connect with other Bluetooth Low Energy devices, like HC-08, HM-10, etc, but if using the Speedy Bee Bluetooth-UART Adapter, this Bluetooth module will deactivate and activate automatically according to the status of the drone(armed/disarmed), no Bluetooth signal interference during the flight.

Flight Controller Requirements:
Betaflight firmware version ≥ 3.1.0
iNav FC version ≥ 1.8.1
Butterflight firmware version ≥ 3.1.0
System Requirements : Android 4.3 +

Instructions for use:
1.Connect the Bluetooth PCB with the UART interface of the Flight Controller, or use the flight controller integrated  Bluetooth.
2.Open the Betaflight Configurator, on the Ports tab, open the Configuration/MSP port of the Bluetooth PCB, for the Bluettooth module of BLE4.0, 19200 is the recommended baud rate value.
3.Open the APP, connect the Flight Controller via Bluetooth, and you can adjust the parameters now.

Notes:
1.Currently Betaflight/Butterflight/iNav configurator supported.
2.support BLE(Bluetooth Low Energy)/OTG-USB.