Return `None` if nothing received.
         """
         device_path = self.get_device_path(report_id or self.report_ids[0])
         Return `None` if nothing received.
         """
         device_path = self.get_device_path(report_id or self.report_ids[0])
             os.set_blocking(fd.fileno(), False)
             report = fd.read(self.out_report_lengths[0])
             if report is not None:
             os.set_blocking(fd.fileno(), False)
             report = fd.read(self.out_report_lengths[0])
             if report is not None: