RC522 RFID Reader Writer Module 13.56MHz for Arduino

The RC522 RFID Reader Writer Module 13.56MHz Kit for Arduino delivers a compact, ready-to-integrate solution for contactless identification projects and DIY security systems; operating at the global 13.56MHz standard, it supports common contactless smart cards and tags and connects via a fast SPI interface for reliable, low-latency communication, while offering both read and write capability for unique IDs and memory blocks to enable logging, access control, inventory tracking, and electronic door locks with straightforward Arduino integration and dependable performance.

Built around the MFRC522 chip, the board reads and writes ISO 14443A cards and tags - including MIFARE Classic 1K/4K and Ultralight - at a close-proximity range of a few centimeters, which is exactly what you want for access control. It runs on 3.3 V power with an SPI interface supported by the ubiquitous Arduino MFRC522 library, so card-UID door locks, attendance loggers, and tap-to-start projects come together in an evening.