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ModbusServer Project

The ModbusServer project integrates a Modbus TCP server with a Flask-based HTTP API, enabling users to read from and write to Modbus registers via HTTP requests. This solution is designed to facilitate interaction with Modbus devices over the network, making it suitable for various applications in automation, IoT, and industrial control systems.

Features

  • Modbus TCP Server: Hosts a Modbus server for interaction with Modbus clients and devices.
  • Flask HTTP API: Provides HTTP endpoints to read and write Modbus register values.
  • Concurrent Operation: Runs both Modbus and HTTP servers concurrently, allowing simultaneous Modbus and web interactions.

Prerequisites

  • Python 3.6 or higher
  • pip for Python 3

Installation

  1. Clone the Repository

    git clone https://example.com/ModbusServer.git
cd ModbusServer

  2. Setup a Virtual Environment (Optional but recommended)

    python3 -m venv venv
source venv/bin/activate  # On Windows use `venv\Scripts\activate`

  3. Install Dependencies

    pip install -r requirements.txt

Running the Server

  1. Start the Server

    python server.py

    This command starts both the Modbus TCP server on port 5020 and the Flask HTTP server on port 5000.

Usage

Modbus TCP Server

Connect to the Modbus TCP server using any Modbus TCP client on port 5020.

HTTP API Endpoints

  • Read Modbus Registers

    Send a GET request to http://localhost:5000/modbus to read values from predefined Modbus registers.

  • Write to Modbus Registers

    Send a POST request to http://localhost:5000/modbus with a JSON payload specifying the register values to write, e.g.,

    {
  "1": 100,
  "2": 50,
  "3": 25
}

Contributing

Contributions to the ModbusServer project are welcome. Please follow the standard fork-pull request workflow on GitHub to submit your changes.