Cross platform GUI MODBUS TCP/RTU simulator & gateway. Interprets data types including ascii float and int.

• UpdatedMar 24, 2025
• Java

Modbus simulator based on modbus-tk and kivy

• UpdatedDec 24, 2021
• Python

ModbusTools are cross-platform (Windows, Linux) Modbus simulator tools (client and server) with GUI to work with Modbus protocol (TCP,RTU,ASCII)

• UpdatedMay 1, 2025
• C++

Free Modbus Slave Simulator in the form of a standalone Windows app supporting Modbus RTU, TCP, UDP and ASCIIoverRTU protocols. The simulator does allow setting values before the connection is established as well as running multiple instances of the app at the same time. Also included are Linux and Mac OS X Mono versions.

• UpdatedFeb 20, 2025
• C#

Modbus Slave Simulator (early ModbusPal Enhanced) is a Java MODBUS Protocol Slave Simulator.

• UpdatedApr 28, 2025
• Java

Standalone Windows app supporting Modbus RTU, TCP, UDP, RTUoverTCP, RTUoverUDP, ASCIIoverRTU, ASCIIoverTCP and ASCIIoverUDP protocols. It is designed to allow running multiple instances of the app at the same time, just use a different port. Also included are Linux and Mac OS X Mono versions.

• UpdatedFeb 20, 2025
• C#

Modbus simulator CLI is a high-performance modbus TCP server with customizable simulation. Available as CLI tool or as docker image

• UpdatedDec 9, 2024
• Kotlin

Standalone Windows application - Master for Allen Bradley, some Omron and Modbus PLCs. It is using libplctag library and C# Wrapper. Also included is the Mono version for Mac OS X (which should work fine in Windows as well as Linux Mono - see notes).

• UpdatedAug 16, 2024
• Visual Basic .NET

Android tablet app for testing WiFi communication with Allen Bradley and/or Modbus programmable logic controllers (PLC) on a local network. Master to communicate with slave devices. This is using libplctag / jna libraries.

• UpdatedDec 6, 2023
• Java

A simple tool to simulate Modbus TCP and/or Modbus RTU slave

• UpdatedMar 15, 2024