Problem solved!
For anyone trying to get RTK to work by connecting a wire from the TX of a Waveshare BS HAT to the RX od a Wareshare DA HAT, you need to remove R13 and R14 on the back of the boards to disable the LEDs.
Problem solved!
For anyone trying to get RTK to work by connecting a wire from the TX of a Waveshare BS HAT to the RX od a Wareshare DA HAT, you need to remove R13 and R14 on the back of the boards to disable the LEDs.