Use unused GPIOs when RS485 is deactivated

[pasrom]

I propose utilizing the currently unused RS485_RE and RS485_R̅E̅ pins when RS485 communication is disabled. These GPIOs could be repurposed to control an external actuator or serve other similar tasks.

Before proceeding, it would be necessary to evaluate whether there is sufficient space on the PCB for this modification.

Looking forward to hearing your thoughts on this enhancement!

[martinjaeger]

Sounds like a good idea. Would you suggest to add another 4-pin connector with the two GPIOs, VCC and GND? Could be a little bit tricky to find space for that.

[pasrom]

What do you think about expanding the existing UART-JST connector to add these two additional pins? It would actually make sense, as the UART can also be used as GPIO when not in use, providing a total of four GPIOs. This approach would minimize space requirements compared to adding a new connector. However, one drawback is that the existing cables would not be compatible, so new cables would be needed.