Design of autonomous multi-sensing passive UHF RFID tag for greenhouse monitoring

International audienceWhen it comes to management modernization of greenhouses, UHF RFID technology, with its passivecharacter and low-cost and power consumption, presents a very efficient solution. To this end, an EPCglobal C3 SL900A sensor tag is enhanced by integrating energy harvesting and multi-sensing capabilities.The challenge of using only the fundamental carrier as an energy-harvesting source without the needfor other auxiliary energy or battery source is considered and evaluated. The developed architectureuses a deep power consumption management strategy and operates autonomously under full passivemode for sensing the required parameters in the grown monitoring process. This architecture does notintegrate any chemical components or batteries, making it safe and more suitable for agriculture-relatedapplications. It can also be considered as an auto-adaptive data-rate sensor device, such as the rate changeaccording to the amount of harvested energy. Furthermore, this architecture can write all sensors’ datasimultaneously into the tag IC user memory. This latter is easily accessible by any standard UHF RFIDreader