I can't offer much help on the Arduino library, but this is how you would go about setting up AdvancedHMI:
- Add a ModbusRTU driver from the ToolBox to the form
- Set the ComPort, BaudRate, etc. to match that of the Arduino
- Add a BasicLabel to the form
- Set the PLCAddressValue property to the Modbus address that will be used in the Arduino, such as 40001
Run the application and if everything is setup properly with the communcations, you should see the value that is mapped to the 40001 register.