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: