Im just a nube so it took me a while to figure it out. on the unitronix side assign a slave to one of the ports like this on the python side read data with something like this import modbus_tk import modbus_tk.defines as cst import modbus_tk.modbus as modbus import modbus_tk.modbus_tcp as modbus_tcp import logging logger = modbus_tk.utils.create_logger("console", level=logging.DEBUG) master = modbus_tcp.TcpMaster(host='', port=20257, timeout_in_sec=5.0) master.op