Reach RTK position output via UART to microcontroller

Blue is the Comms devices’ RX and white is the TX.
Black is GND.
I hope to power the RTK through the df13 in deployment.

P.S. I’ve reflashed the firmware to 2.22.2

P.P.S. I have tried connecting to my PC but the RTK isn’t being assigned a valid COM (showing up under ‘Other devices’ only).