RFID is a non-contact identification technology from a professional point of view, which is divided into two types: active and passive. Working principle: The RFID reader emits radio frequency, passes through the coil of the electronic tag, generates a signal, and the reader reads and decodes the information to complete the entire identification process.
RFID reader (reader writer) communicates wirelessly with RFID electronic tag through antenna, which can read or write tag identification code and memory data. A typical reader consists of a high-frequency module (transmitter and receiver), a control unit, and a reader antenna. Among them, electronic tags are also called RF tags, transponders and data carriers