tModbus

A modern Python Modbus library that is fully typed and well- tested.

Modbus is based on the master/slave communication pattern. We choose to use the terminology client and server instead, as it is more clear.

A simple example

import asyncio

from tmodbus import create_async_tcp_client


async def main() -> None:
    """Show example of reading a Modbus register."""
    async with create_async_tcp_client("127.0.0.1", 502, unit_id=1) as client:
        response = await client.read_holding_registers(start_address=100, quantity=2)
        print("Contents of holding registers 100 and 101: ", response)


if __name__ == "__main__":
    asyncio.run(main())