code: async def set_hot_water_ovrd(self, state, timeout=OTGW_DEFAULT_TIMEOUT):
          
          cmd = OTGW_CMD_HOT_WATER
          status = {}
          ret = await self._wait_for_cmd(cmd, state, timeout)
          if ret == 'A':
              status[OTGW_DHW_OVRD] = None
          elif ret in ['0', '1']:
              status[OTGW_DHW_OVRD] = int(ret)
          self._update_status(status)
          return ret
docs: Control the domestic hot water enable option. If the boiler has
          been configured to let the room unit control when to keep a
          small amount of water preheated, this command can influence
          that.
          @state should be 0 or 1 to enable the override in off or on
          state, or any other single character to disable the override.
          Return the accepted value, 'A' if the override is disabled
          or None on failure.
  
          This method is a coroutine