The device that I'm using has a command that allows the device ID to be identified. To send the command, I need to send a message to the device address 250 and the incoming message will include the device address (ID = 1 in this case). Outgoing Message: FA | 03 | 00 66 | 00 01 | 71 93 Incoming Message: 01 | 03 | 02 | 00 01 | 79 84 The result is as expected, but Pymodbus sees this as a ID mismatch and throws an error. Does anybody know how to create an exception for this scenario whenever I attempt to read the register? #Functions def is_unit_id_mistmatch_error(exc: ModbusIOException, expected_id: int, actual_id: int) -> bool: return ( "Unit ID mismatch" in str(exc) and f"expected {expected_id}" in str(exc) and f"got {actual_id}" in str(exc) ) #Reading Initial Address - Issue with pymodbus strict id checking try: read_address = client.read_holding_registers(address=66, count=1, slave=250) except ModbusIOException as exc: if is_unit_id_mistmatch_error(exc, expected_id=250, actual_id=1): print("Ignoring expected unit ID mismatch 250 -> 1... Continuing") Continue reading...
