Passive UHF RFID backscattering for indoor lighting control

This paper proposes the use of a passive RFID light sensor in a daylight-adaptive lighting system. In such a system, the dimming levels of light sources are adapted to changing daylight such that a desired illuminance distribution is achieved at the place. The system is composed by photo-sensible passive RFID tags used as light sensor nodes and RFID readers connected to a central controller. The use of the passive UHF RFID technology avoids the use of complex feedback light control algorithms as also simplify the deployment of the sensor network. Experimental results showed the proposed solution. The light variations can be sensed with high resolution having completely passive and wireless sensors.