public String getPIDNVID(){
        Context context = new Context();

        LibUsb.init(context);
        DeviceList list = new DeviceList();
        StringBuilder buffer = new StringBuilder();
        LibUsb.getDeviceList(context, list);

        for(Device device: list){
            DeviceDescriptor descriptor = new DeviceDescriptor();
            LibUsb.getDeviceDescriptor(device, descriptor);
            buffer.append(String.format("%04X", (descriptor.idVendor())));
            buffer.append(':');
            buffer.append(String.format("%04X", (descriptor.idProduct())));
            buffer.append("\n");

        }
        String result = new String();
        result = buffer.toString();

        LibUsb.freeDeviceList(list, true);

        LibUsb.exit(context);
        return result;
    }