create method
Creates a UsbPort from the UsbDevice.
type
can be any of the UsbSerial.CDC, UsbSerial.CH34x, UsbSerial.CP210x
, UsbSerial.FTDI or USBSerial.PL2303
values or empty for auto detection.
returns the new UsbPort or throws an error on open failure.
Implementation
Future<UsbPort?> create([String? type, int? portNum]) async {
_port = await UsbSerial.createFromDeviceId(deviceId, type, portNum);
return _port;
}