OverviewÂ
The RC522 RFID Module is a highly integrated reader/writer for contactless communication at 13.56MHz. Based on the MFRC522 chip by NXP, it supports ISO/IEC 14443 A/MIFARE cards. This module is the “go-to” choice for students and hobbyists in Pakistan building contactless payment systems, attendance logs, or electronic door locks. It uses the SPI protocol, making it compatible with almost any microcontroller, from the basic Arduino Uno to the high-performance ESP32.
Key Features
Complete Kit: Usually includes the RC522 board, a standard S50 blank card, and a keychain fob.
Non-Contact Reading: Operates at 13.56MHz with a reading range of about 3–5cm.
Low Power & Compact: Designed for low-voltage applications, making it ideal for battery-operated devices.
Huge Library Support: Works perfectly with the
MFRC522.hlibrary, offering hundreds of example sketches for quick deployment.Highly Customizable: Read/Write data to specific blocks on the card for advanced security or storage.
Technical SpecificationsÂ
| Feature | Specification |
| Operating Voltage | 3.3V DC (Not 5V compatible!) |
| Operating Frequency | 13.56 MHz |
| Interface | SPI (Serial Peripheral Interface) |
| Data Transfer Rate | Max 10Mbit/s |
| Operating Current | 13–26mA |
| Sleep Current | < 80uA |
| Supported Card Types | mifare1 S50, mifare1 S70, mifare UltraLight, mifare Pro, mifare Desfire |


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