RFID, the new key
RFID is an acronym for "radio-frequency identification" and refers to a technology where digital data is encoded in RFID tags or smart labels being read by radio waves.
At a basic level, RFID consists of two components: an RFID tag and an RFID reader with an antenna coil. RFID tags contain an integrated circuit and an antenna, used to transmit data to an RFID reader. The reader will convert the modulated radio waves to a more usable form of data. Information collected from the tags will be transferred through a communication interface to the next controller unit, which could be the microcontroller of a battery-powered electronic cylinder or handle or the host computer system connected to the desk reader.