code: async def set_setback_temp(self, sb_temp, timeout=OTGW_DEFAULT_TIMEOUT):
          
          cmd = OTGW_CMD_SETBACK
          status = {}
          ret = await self._wait_for_cmd(cmd, sb_temp, timeout)
          if ret is None:
              return
          ret = float(ret)
          status[OTGW_SB_TEMP] = ret
          self._update_status(status)
          return ret
docs: Configure the setback temperature to use in combination with
          GPIO functions HOME (5) and AWAY (6).
          Return the new setback temperature, or None on failure.
  
          This method is a coroutine