Description
RC522 RFID Reader/Writer Module 13.56MHz SPI S50 for Arduino, ESP32 & Raspberry Pi
The RC522 RFID Reader/Writer Module is a compact, low-power 13.56MHz RFID communication module designed for reading and writing MIFARE S50 compatible RFID cards and tags. Built around the reliable NXP MFRC522 RFID chip, it supports ISO/IEC 14443 Type-A communication and interfaces with microcontrollers using the SPI protocol.
Available in two variants, you can choose the complete starter kit with an RFID card and keychain tag or the board-only version for integrating into your existing RFID projects.
Operating at 2.5V–3.3V, the RC522 module features advanced modulation, high-speed data transfer up to 848 kBd, integrated CRC coprocessor, programmable timer, 64-byte FIFO buffer, internal self-test, and software power-down mode for reliable RFID communication.
It is an excellent solution for RFID access control, attendance systems, smart locks, inventory management, asset tracking, contactless authentication, IoT projects, and embedded development.
Key Features
- Based on NXP MFRC522 RFID controller.
- 13.56MHz contactless RFID communication.
- Supports ISO/IEC 14443 Type-A & MIFARE S50 cards.
- Read and write RFID cards and tags.
- SPI communication interface.
- Reading distance up to 50mm.
- Data transfer speed up to 848 kBd.
- SPI communication up to 10 Mbit/s.
- Built-in 64-byte FIFO buffer.
- Integrated CRC coprocessor.
- Flexible interrupt modes.
- Software power-down mode.
- Internal self-test function.
- Low power consumption.
- Compact PCB design.
- Compatible with Arduino, ESP32, ESP8266, STM32 & Raspberry Pi.
Technical Specifications
| Specification | Details |
| Product Name | RC522 RFID Reader/Writer Module |
| Model | RC522 / MFRC522 |
| RFID Frequency | 13.56 MHz |
| RFID Standard | ISO/IEC 14443 Type-A |
| Supported Cards | MIFARE S50, RFID Tags |
| Communication Interface | SPI |
| SPI Speed | Up to 10 Mbit/s |
| Operating Voltage | 2.5V – 3.3V DC |
| Logic Level | 3.3V |
| Reading Distance | Up to 50 mm |
| Data Transfer Speed | Up to 848 kBd |
| FIFO Buffer | 64 Bytes |
| CRC Coprocessor | Built-in |
| Timer | Programmable |
| Power Saving | Software Power-Down Mode |
| Self-Test | Supported |
| Compatible Boards | Arduino UNO, Nano, Mega, ESP32, ESP8266, STM32, Raspberry Pi |
Variant Specifications
| Variant | Included Accessories |
| RFID Kit Reader/Writer RC522 SPI S50 with RFID Card & Tag | RC522 RFID Module, RFID Card, RFID Keychain Tag, Straight Header Pins, Right-Angle Header Pins |
| RFID Reader/Writer RC522 SPI S50 (Board Only) | RC522 RFID Module, Straight Header Pins, Right-Angle Header Pins |
Applications
- RFID Access Control.
- Smart Door Lock Systems.
- Attendance Management.
- Employee Identification.
- Student ID Systems.
- Asset Tracking.
- Inventory Management.
- Contactless Authentication.
- Smart Meter Projects.
- Home Automation.
- IoT Projects.
- Robotics.
- Arduino Projects.
- ESP32 Development.
- Raspberry Pi Projects.
- Industrial Automation.
Precautions
- Operate only with 2.5V–3.3V supply voltage.
- Do not connect directly to 5V logic pins without a level shifter.
- Use only 13.56MHz RFID cards and tags.
- Ensure correct SPI pin connections before powering the module.
- Avoid placing metal objects close to the antenna during operation.
- Protect the module from static electricity.
- Store the board in a dry and dust-free environment.
- Disconnect power before changing wiring connections.