The RC522 RFID module enables contactless communication with MIFARE cards/tags (13.56MHz). Ideal for access control, payment systems, and inventory tracking, it supports reading, writing, and encryption via SPI, I2C, or UART interfaces.
Key Benefits
✔ Multi-Protocol – Works with MIFARE Classic 1K/4K, Ultralight, NTAG
✔ Three Interfaces – SPI (default), I2C, UART (jumper-selectable)
✔ Encryption Support – AES, CRYPTO1
✔ Compact Design – Integrated antenna (3–5cm range)
Technical Specifications
Core Specifications
Chipset: NXP RC522
Frequency: 13.56MHz (HF RFID)
Operating Voltage: 2.5V–3.3V (5V-tolerant I/O)
Communication: SPI/I2C/UART (default: SPI)
Read Range: 3–5cm (depends on antenna/tag)
Electrical Characteristics
Current Draw: 13–26mA (during operation)
Standby Current: 10μA (low-power mode)
Interface Pins:
SPI: SCK, MOSI, MISO, NSS, GND, RST, 3.3V
I2C/UART: Configurable via jumpers
Physical Properties
Dimensions: 40mm × 60mm
Antenna: Onboard copper coil
Mounting: 4x M2 screw holes
Why Choose the RC522?
✔ Arduino-Compatible – Libraries like MFRC522 available
✔ Multi-Card Support – Handles UID, NDEF, and data blocks
✔ Cost-Effective – Cheaper than PN532 for basic RFID
Common Uses:
Door access systems
Public transport card emulation
Library inventory tracking
Pro Tip:
For longer range, add an external antenna (up to 10cm).
Use I2C to save pins on ESP8266/Arduino.
Package Includes:
1 x RC522 RFID Reader Writer Module