modbus_rtu_server
Overview
This example demonstrates how to use Modbus RTU protocol to communication.
FreeModbus supports bellow feature:
Read coil(0x01)
Read discrete inputs(0x02)
Read holding registers(0x03)
Read input registers(0x04)
Write single coil(0x05)
Write single holding register(0x06)
Write board LED status(0x0d)
Read board LED status(0x0e)
Write multiple coils(0x0f)
Write multiple holding registers(0x10)
Running the demo
If the test passes, serial port output:
Modbus RTU Server Example Start!
Use the modbus client simulator to read holding registers(0x3) to test modbus function