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The RC522 RFID Reader Module (13.56 MHz) uses the NXP MFRC522 chip and communicates via SPI. Operating at 3.3 V, it reads/writes ISO/IEC 14443A RFID cards (e.g., MIFARE), with a typical range of 20–60 mm. Ideal for access control, attendance systems, security projects, and IoT authentication. Compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers. |
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