Complete Arduino RFID tutorial using RC522 module. Learn wiring, programming, and build practical projects like door locks. Code examples included.

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The RC522 RFID reader is interfaced with Arduino using SPI protocol. The following circuit connections are made for interfacing the RFID reader with Arduino UNO.

The read/write device consists of a Radio Frequency module and an antenna that generates a high-frequency electromagnetic field while the tag is usually a passive device that contains a microchip that ...

The MFRC522 requires a regulated 3.3v power supply, which is provided on the board, so that you don’t have to worry about it! – MFRC522 connection header: This is where the MFRC522 RFID reader ...

Therefore, an effort was made to design a tool for “identification of impedance changes in metals using an Arduino Uno-based RFID RC522” which is relatively inexpensive and easy to carry.