tmodbus

library0.3.0pypypiunverified

A modern, strongly typed Modbus client library for Python 3.12+ with async support, using Pydantic for data validation. Current version 0.3.0, released 2025-02-20. Active development, monthly releases.

devops

pip install tmodbus

github ↗homepage ↗

INSTALL

IMPORT

SIG · TMODBUS

tmodbus

devopspythonv0.3.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

AsyncModbusClient

✓ from tmodbus import AsyncModbusClient

✗ from tmodbus import ModbusClient

create_async_tcp_client

✓ from tmodbus import create_async_tcp_client

client

✓ from tmodbus import client

Basic TCP client connecting to localhost:502 and reading 10 holding registers from unit ID 1.

import asyncio from tmodbus import ModbusClient async def main(): async with ModbusClient(host='localhost', port=502) as client: result = await client.read_holding_registers(1, 0, 10) print(result) asyncio.run(main())

Debug

Known issues

breakingRequires Python >=3.12. Using older Python versions results in an import error.

fix

Upgrade to Python 3.12 or later.

affects: <3.12

gotchaAll client methods are async. Must be called with await inside an async context. Calling synchronously without await will raise TypeError or return coroutine.

fix

Ensure the calling function is async and use await.

affects: all

deprecatedUsing positional arguments for network parameters (host, port) is deprecated since 0.2.0. Use keyword arguments instead.

fix

Use ModbusClient(host='...', port=...)

affects: >=0.2.0

Upgrade

Version history

0.3.0latest on PyPI · released Apr 29, 2026

Audit

Dependencies

No dependency data recorded yet.

Agent activity

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Resources

githubhttps://github.com/wlcrs/tmodbus ↗

homepagehttps://github.com/wlcrs/tmodbus ↗