'Move the cover to a specific position.'

def set_cover_position(self, **kwargs):

    position = kwargs.get(ATTR_POSITION)
    set_req = self.gateway.const.SetReq
    self.gateway.set_child_value(self.node_id, self.child_id, set_req.V_DIMMER, position)
    if self.gateway.optimistic:
        self._values[set_req.V_DIMMER] = position
        self.schedule_update_ha_state()
