Seed_microbit UART connection to Main Bus missing

There is no RX/TX connection with the main bus. The question is: what should be connected, and how?

Currently, the UART from the microbit and the two mikroBUS interfaces are directly connected. Should we connect this shared UART to the main bus, or should we have three conditional connections instead?

UART lines should be swapped (RX → TX and TX → RX) between two endpoints, but we don’t know if the lines are already swapped when coming from the main bus. We must avoid double-swapping. This might require a conditional swap for each line connected to the main bus, which adds design complexity.