UART

Serial Ports (all mapped to the corresponding number, IE T4 R4 is Serial_4)

1. Purple, Designated for the CM4 telemetry link using a male to male jumper.

2. Brown, Designated for an external GPS, located next to I2C.

3. Blue, Free use

4. Orange, Free use

5. White, Serial 5 is shared with SBus in. If you are using a SBus Rx then Serial 5 is unavailable.