Bluetooth to Telemetry Bridge

1. Must convert the bluetooth hardware to 57600 Baudrate to match up with the baudrate from the 3DR telemetry.

2. Then using the bluetooth hardware, solder it to the 3dr telemetry.

http://ez-gui.com/other/bluetooth-3dr-radio-bridge/

How to setup bluetooth using AT Command

https://howtomechatronics.com/tutorials/arduino/how-to-configure-pair-two-hc-05-bluetooth-module-master-slave-commands/