Getting device/driver information related to a COM port?

Question

I have a Serial-to-USB device with a similarly named device driver in the Windows device manager. The devices do not always grab the same COM port on system boot, so my prog

Answer 1

@robjb Your code does not allow for more than one device to be connected. How will the user know the device name? I added to your code thus to return a list of com ports:

    ArrayList subKeys = WinRegistry.readStringSubKeys(WinRegistry.HKEY_LOCAL_MACHINE, keyPath);
    ArrayList comPorts = new ArrayList();
    for (String subKey : subKeys) {
        String friendlyName = getFriendlyName(keyPath + subKey);
        if (friendlyName != null && friendlyName.contains("MyDriverName") && friendlyName.contains("COM")) {
            int beginIndex = friendlyName.indexOf("COM") + 3 /*length of 'COM'*/;
            int endIndex = friendlyName.indexOf(")");
            comPorts.add(Integer.parseInt(friendlyName.substring(beginIndex, endIndex)));
        }
    }

Update: I don't think these are solutions. Why? This information is statically stored in the registry - even when the device is not connected.