phox-modbus

Overview

This module is a Python Modbus serial RTU driver

It has been developped as Modbus layer for PHOXENE’s devices that implements a serial Modbus communication.

It is realeased under a free software licence, see the LICENSE file for more details

MIT License Copyright (c) 2025 PHOXENE

Features

  • Implemented Modbus functions:

    • Function 03 - Read holding registers

    • Function 04 - Read input registers

    • Function 05 - Force single coil

    • Function 06 - Preset single register

    • Function 08 - Subfunctions 0, 1, 2, 4 and 11 to 20 - Diagnostics

    • Function 11 - Get comm event counter

    • Function 12 - Get comm event log

    • Function 16 - Write multiple registers

    • Function 17 - Report server ID

    • Function 43 - MEI 14 - Read device identification

  • Use fast reception mode that is not legacy (skip receive timeout by using frame lenght prediction). A legacy mode is available.

  • Hack tools allows to test modbus server response to corrupted frames

  • Optional feeeback of sent and received frames as well as Modbus events. Main usage is debbug.

  • The files in this package are 100% pure Python.

Requirements

  • Pyhton 3.7 or newer

  • Windows 7 or newer

  • Debian 10 or newer

Installation

phox-modbus can be installed from PyPI:

pip install phox-modbus

Developers also may be interested to get the source archive, because it contains examples, tests and this documentation.