◈ Desktop App

Modbus Client
& Server Simulator

Monitor, write, and simulate Modbus devices on macOS, Windows, and Linux. Built-in TCP Server with random data generator — test your PLC or HMI without any hardware.

⬇ Download for macOS ⬇ Free for Windows ⬇ Free for Linux View Features

macOS · Apple Silicon · v0.1.7 · $4.99 · Windows · x64 · v0.1.7 · Free · Linux · x64 · v0.1.5 · Free

Features

Everything you need for Modbus testing

Built with Tauri + Rust for native performance on macOS, Windows, and Linux, with a clean, minimal interface.

🔌

RTU Serial Connection

Connect via any serial port with full configuration — baud rate, data bits, stop bits, parity, and timeout.

🌐

TCP/IP Connection

Connect to Modbus TCP devices over the network. Configure host IP, port (default 502), and connection timeout.

📡

Read Registers

Supports FC01 (Coils), FC02 (Discrete Inputs), FC03 (Holding Registers), and FC04 (Input Registers).

✏️

Write Registers

Write single or multiple coils and registers with FC05, FC06, FC15, and FC16 function codes.

🔄

Auto Polling

Continuous polling at configurable intervals (100ms – 60s). Track TX, RX, and error counters in real time.

🔢

28 Display Formats

From 16-bit integers to 64-bit doubles, with signed, unsigned, hex, and binary views plus AB CD / CD AB / BA DC / DC BA byte ordering built in.

🖥️

TCP Server Simulator

Run a built-in Modbus TCP slave directly from the app. Respond to FC01–FC16 requests from any master on your network. No hardware required.

🎲

Random Data Generator

Auto-randomize holding registers, input registers, coils, or discrete inputs on a configurable interval (250ms–5s). Perfect for stress-testing HMIs and dashboards.

🔍

Serial Scan

Automatically find a device's slave ID or baud rate over RTU serial — no more guessing connection settings.

📶

LAN Scan

Discover Modbus TCP devices on your network by scanning an IP/subnet and host range, with configurable timeout.

Screenshots

See It in Action

Client & Server — Run both in one app

Real-time Modbus Monitoring — DEC, HEX, BIN, FLOAT

Built-in TCP Server Simulator with Random Data Generator

Scan Slave IDs — Find devices without guessing settings

28 Display Formats — 16-bit to 64-bit, with AB CD / CD AB / BA DC / DC BA byte ordering

Specifications

Technical Details

Platform

macOS · Windows · Linux

Architecture

Apple Silicon · x64

Version

0.1.7

macOS Installer

Mac App Store

Windows Installer

MSI (x64)

Linux Installer

deb / rpm / AppImage

RTU Protocol

Modbus RTU

TCP Protocol

Modbus TCP

Default TCP Port

502

Slave ID Range

1 – 247

Max Registers

125 / poll

Built With

Tauri + Rust

Download

Get Modbus Poll

macOS

Version 0.1.7 · Apple Silicon · $4.99

⬇ Download on App Store

Available on the Mac App Store.

🪟

Windows FREE

Version 0.1.7 · x64 · MSI Installer

⬇ Download for Windows

Free MSI installer for Windows x64.

🐧

Linux FREE

Version 0.1.5 · x64 · deb / rpm / AppImage

⬇ Download .deb

Also available: .rpm · .AppImage

Modbus Client & Server Simulator