用于小区或大楼管理系统，管理员能直接看出来那个房间的门没有关，若门没关一定时间，特定的门上的灯亮的颜色不同。若长时间不关门会报警。-For the district or building management system, administrators can directly see that the room door is not related to a certain time if not closed the door, the door of a particular col