Sometimes it's just easier to run a 2 pair / 4 wire RS485 link so that the TTL-RS485 driver and receiver chips can just be hardwired for direction control. That then would mean no software changes required at all on the arduino serial side.
Lefty
Sometimes it's just easier to run a 2 pair / 4 wire RS485 link so that the TTL-RS485 driver and receiver chips can just be hardwired for direction control. That then would mean no software changes required at all on the arduino serial side.
Lefty