Description
The RC522 RFID Reader Module is a low-cost, highly integrated RFID/NFC solution that operates at 13.56 MHz. It supports reading and writing to MIFARE 1K/4K RFID cards and tags.
The module uses an SPI interface (with optional I²C/UART support) for fast communication with microcontrollers such as Arduino, ESP32, and Raspberry Pi.
It is commonly used in access control systems, attendance systems, contactless identification, IoT authentication, and secure door-lock projects.
The module includes an onboard PCB antenna for stable reading performance and offers up to 5 cm reading distance depending on card/tag type.
Key Features
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13.56 MHz RFID/NFC Reader/Writer
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Supports MIFARE 1K, 4K, Ultralight, and compatible tags
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SPI interface for fast communication
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Optional I²C and UART (via firmware configuration)
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Low power consumption
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Up to 5 cm read distance
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Compact, easy-to-integrate design
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Compatible with Arduino, ESP32, Raspberry Pi
Specifications
| Feature | Details |
|---|---|
| Operating Voltage | 3.3V DC |
| Communication | SPI (default), I²C, UART |
| Operating Frequency | 13.56 MHz |
| Supported Tags | MIFARE 1K/4K, Ultralight, NTAG |
| Maximum Read Range | Up to 5 cm |
| Current Consumption | 13–26 mA |
| Logic Levels | 3.3V (use level shifter for 5V boards) |
| Dimensions | 40 × 60 mm |
Applications
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RFID access control systems
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Attendance and logging systems
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Smart door locks
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NFC-based IoT authentication
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Asset tracking and inventory systems
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Contactless identification systems
Compatible Boards / Circuits
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Arduino (Uno, Mega, Nano — via level shifting)
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ESP32 / ESP8266 (direct 3.3V logic)
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Raspberry Pi
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Works with RFID cards, key fobs, stickers, and tags
Reviews
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