docs: def _callback_set_qs_value(self, key, val, success):
          """Push state to QSUSB, retry with backoff."""
          set_url = URL_SET.format(self._url, key, val)
          with self._lock:
              for _repeat in range(1, 6):
                  set_result = requests.get(set_url)
                  if set_result.status_code == 200:
                      set_result = set_result.json()
                      if set_result.get('data', 'NO REPLY') != 'NO REPLY':
                          # self.devices._set_qs_value(key, set_result['data'])
                          success()
                          return True
                  sleep(0.01 * _repeat)
          _LOGGER.error("Unable to set %s", set_url)
          return False