PyModbus
- Software
- Robot arms and industry
- Library
A Python implementation of the Modbus protocol, providing client, server and simulator components with both synchronous and asynchronous APIs.
Made by pymodbus, Spain (checked on github.com/pymodbus-dev (opens in a new tab)).
Source on GitHub: github.com/pymodbus-dev/pymodbus (opens in a new tab). Facts read at commit 61ea2af (opens in a new tab).
Licenses
- Code
- BSD-2-Clause (opens in a new tab)
Read by Robotheca from LICENSE (opens in a new tab) (BSD-2-Clause) at commit 61ea2af (opens in a new tab), on 16 Oct 2026.
- Commercial use
- Yes
What it does
- Offers a Modbus client to connect to devices, with synchronous and asynchronous APIs.
- Lets you build your own Modbus server or emulate real devices.
- Includes a web-based server simulator for configuring device structure and monitoring traffic.
- Supports serial RS-485, TCP, TLS and UDP communication and the standard RTU, ASCII, TCP and socket frames.
- Supports custom function codes and aims to follow the standard Modbus protocol.
- Has no third-party dependencies apart from the optional pyserial.
Written by Robotheca from the project's README (opens in a new tab) at commit 61ea2af.
Getting started
- Difficulty
- Intermediate
- Hardware it needs, as the project states it
- Python 3 (3.10 or newer required); runs on normal computers and small boards such as a Raspberry Pi. Serial communication needs the optional pyserial package.
- How to start
- The project's README (opens in a new tab)
Maintenance
- Status
- Active: a commit in the last 90 days
- Newest commit
- 16 Oct 2026 on dev
- Latest release
- Pymodbus v3.16.1 (11 Oct 2026)
Checked on GitHub on 16 Oct 2026.
Links
Robots that can run it
No robot on Robotheca is linked to it yet. Links come from a robot's robot.yaml, from its dependency files read as text, or from Robotheca's editors.
Robotheca lists software as a reference: nothing is hosted or run here, and every fact links to where it was read.