public function addRollerShutter($logicalDeviceId, $shutterLevel)
	{
		$logicalDeviceState = $this->actuatorStates->addChild('LogicalDeviceState');
		$logicalDeviceState->addAttribute('xmlns:xsi:type', 'RollerShutterActuatorState');
		$logicalDeviceState->addAttribute('LID', $logicalDeviceId);
		$logicalDeviceState->addChild('ShutterLevel', $shutterLevel);
	}