Hi, i need some help with modbus rtu driver to communicate with raspberry pi via mono. If i use Modbus ip driver and connect plc to raspberry pi with ethernet cable all works ok, and get data. Now i have plc which support only modbus rtu, usb to serial cable and when i start AHMI app on windows OS works fine. But when i try to run it on raspberry pi i dont get any data. When i check on pi where is my usb to serial adapter, i get that adapter is attached to ttyUSB0. Now when i run my app on windows OS it wasnt a problem, i just need to write COM port number to driver settings. Now i dont know how is with linux based OS and how are COMs organized.
