Radio-frequency identification (RFID) application is widely used. In some applications, the RFID tag is put on the user's body and several active readers are placed in different corners of the room. They get some received signal strength indicator (RSSI) value which can judge the user’s relative position in the room [1]. Some people install the RFID tag on a bicycle which thereby acquires a special number. This is coupled with the readers in parks, buildings and at the roadside to form a bicycle anti-theft management system [2]. Traditional automatic lighting controls mostly use the passive infrared sensor (PIR) but are usually limited to use on buildings. As an example, to use a passive RFID tag becomes a lighting monitoring system for a campus