Fading Coder

An Old Coder’s Final Dance

Building a Modbus RTU Master and Slave with Qt 5 and libmodbus on Windows

This guide shows how to integrate libmodbus with a Qt 5 application on Windows to implement both a Modbus RTU master (client) and a Modbus RTU slave (server). The examples use a simple Widgets-based UI, periodically enumerate serial ports, and demonstrate reading holding registers from multiple slav...