Pymodbus is a full Modbus protocol implementation. It is currently supports the following :

Client Features: * Can perform single get/set on discrete and registers * Can perform multiple get/set on discrete and registers * Working on diagnostic/file/pipe/setting/info requests * Can fully scrape a host to be cloned

Server Features: * Can function as a fully implemented TCP/ASCII modbus server * Full server control context * Working on serial communication * Working on functioning as a RTU * Can mimic a server based on the supplied input data

For asynchronous communication, you need python-twisted-core. For serial communication, you need python-serial.

This package provides the Python 3.x module.