RFID RC522 I2C Module

Description

Radio-Frequency Identification (RFID) is a technology used to wirelessly identify and track objects, which is based on the principle of wireless communication through the use of RFID tags and RFID readers. RFID tag: An RFID tag is a small chip that contains a unique identifier UID (usually a numeric code) along with some memory for storing additional information. These tags usually consist of an RFID chip and an antenna. RFID Reader: An RFID reader is an electronic device that generates a radio frequency signal and sends it to a nearby RFID tag. The reader is also responsible for receiving the response signal from the tag and decoding the tag's information. Rf communication: When an RFID reader sends an RF signal, it activates nearby RFID tags. Passive RFID tags get energy from the reader's signal as well as operational commands and use it to send their own response signals. Active RFID tags have their own electricity supply, so they can actively send signals. Application reference: Scenarios requiring object recognition such as management systems and security systems.