async def set_setback_temp(self, sb_temp, timeout=OTGW_DEFAULT_TIMEOUT):
        """
        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
        """
        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