#26 PnPEntity Class of com0com driver

Kamil Adamczuk — Thu, 27 Jun 2019 20:09:58 -0000

Here is an example how I use code above.

PnPEntity Class of com0com driver

Kamil Adamczuk — Thu, 27 Jun 2019 20:06:44 -0000

I have little problem with listing these ports via WMI.

The problem is that com0com drivers have own PnPEntity Class diffrent than

Ports (COM & LPT ports)
Class = Ports
ClassGuid = {4d36e978-e325-11ce-bfc1-08002be10318}
This class includes serial and parallel port devices. See also the MultiportSerial class.

source: https://docs.microsoft.com/en-us/windows-hardware/drivers/install/system-defined-device-setup-classes-available-to-vendors

Does it have to be like this?

I have to do fancy things in C# to make list of Serial Port devices that contains com0com ports.

   try
    {
        List<string> registryPortNames = SerialPort.GetPortNames().ToList();

        ManagementObjectSearcher entitySearcher =
            new ManagementObjectSearcher(@"SELECT * FROM Win32_PnPEntity");

        ManagementObjectCollection moc = entitySearcher.Get();
        foreach (var n in registryPortNames)
        { 
            foreach (var p in moc)
            {
                if (p["Caption"].ToString().Contains("("+n+")"))
                { 
                    Console.WriteLine("PnPEntity port found: " + p["Caption"]);
                    var props = p.Properties.Cast<PropertyData>().ToArray();
                    retList.Add(
                        new SerialPortInfo(n, p["Caption"].ToString(), p["PnPDeviceId"].ToString())
                        );
                }
            }
        }
    }

Recent changes to 26: PnPEntity Class of com0com driver

#26 PnPEntity Class of com0com driver

PnPEntity Class of com0com driver