modbus-client

Open ModScan is a Free Modbus Master (Client) Utility

Most complete Modbus library for Arduino. A library that allows your Arduino board to communicate via Modbus protocol, acting as a master, slave or both. Supports network transport (Modbus TCP) and Serial line/RS-485 (Modbus RTU). Supports Modbus TCP Security for ESP8266/ESP32.

ModbusTools are cross-platform (Windows, Linux) GUI simulators (client/server) that support TCP, UDP, RTU, ASCII, RTU/ASCII over TCP/UDP Modbus protocol types.

PHP client for Modbus TCP and Modbus RTU over TCP (can be used for serial)

Free open-source Modbus client (master) GUI and server simulator for Windows, macOS and Linux. Desktop tool for Modbus TCP, RTU and RTU over TCP. A modern alternative to Modbus Poll and QModMaster.

EasyModbusTCP library for Java implementation

Modbus client for ESP32

Free Modbus TCP & RTU client and server with network discovery, tag monitoring, and diagnostics.

A library to implement the master/client portion of the Modbus RTU protocol on Arduino

Modbus TCP client library to interact with Modbus servers such as PLCs.

Modbus RTU packet sniffer

Modbus client (TCP/RTU) over TCP/Serial for Go

Modbus master and slave implementation in C++

Cross-platform Modbus toolkit (PySide6): master client with register table, polling, live graphs, alarms and bus scanner; device simulator (slave) with register map and expression rules; passive RTU sniffer. EN/RU UI.

ModbusBridge is a simple cross-platform (Windows, Linux) Modbus converter/gateway application that provides mutual convertions between different types of Modbus protocol: TCP, RTU, ASC

A Modbus client in Go

modbusua is a cross‑platform (Windows, Linux) gateway that bridges data between the Modbus and OPC UA

Cross-platform Modbus TCP/RTU client for device testing, register debugging, and importing .mbmap device maps.

Modbus client library for .NET

Java implementation of MODBUS TCP client for master devices.