code: def _control_transfer(self, data):
          
          LOGGER.debug('Ctrl transfer: %r', data)
          self._device.ctrl_transfer(bmRequestType=0x21, bRequest=0x09,
              wValue=0x0200, wIndex=0x01, data_or_wLength=data, timeout=TIMEOUT)
docs: Send device a control request with standard parameters and <data> as
          payload.