pymodbus-dev/pymodbus

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

2762 stars · 1055 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

PyModbus is a full Modbus protocol stack written in Python, providing a client, server, and HTML-based simulator with both synchronous and asynchronous APIs. It targets communication with industrial devices like PLCs and sensors over TCP, RTU, and serial transports.

Use cases

• read registers from a modbus PLC over TCP
• simulate a modbus slave device for testing
• poll sensors with modbus RTU over serial
• build a modbus master client in python
• write a modbus server to emulate industrial equipment
• integrate SCADA systems with python

When to choose

• you need a mature, full-featured Modbus implementation in Python
• you want both client and server plus a simulator
• you need sync and asyncio APIs
• you communicate with standard-compliant Modbus devices

When to avoid

• your devices rely heavily on non-standard Modbus extensions
• you need extremely low-latency or hard real-time communication
• you are not working with the Modbus protocol at all

Facets

library · maturity stable

networking sdk developer-tools iot developer-tools embedded-systems python cross-platform modbus modbus-tcp modbus-rtu scada asyncio industrial-automation client-server simulator automation

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