get com port number of an USB adapter

Question

I am trying to write a program that uses an arduino mega and a FTDI-based USB to RS485 adapter.

I want to make the program user-friendly, thus I don\'t wont the user

Answer 1

as @Marcello Romani pointed out FTDI don't fall into the "serial port" category. Even though I am late I came across this problem recently and I fixed it using another query. Instead of searching in WIN32_SerialPort, you can query the Win32_PnPEntity class.One downside of using this class is that is slow to query.

 using (var searcher = new ManagementObjectSearcher
            ("SELECT * FROM Win32_PnPEntity"))
        {
            string[] portnames = SerialPort.GetPortNames();
            var ports = searcher.Get().Cast().ToList();

            foreach (ManagementBaseObject queryObj in ports)
            {
            }

        }