RC522 RFID Reader Writer SPI Module with Card & Tag

The RC522 RFID module is an NXP MFRC522-based 13.56 MHz contactless reader/writer with SPI interface. Perfect for access control, attendance systems, and smart card projects with Arduino, ESP32, and Raspberry Pi. Includes a blank S50 card and keychain tag.

3.3V supply only, SPI up to 10 Mbit/s — do not connect to 5V
13.56 MHz, ISO/IEC 14443A / MIFARE compatible
Read/write range up to 50 mm
Works with Arduino, ESP32, Raspberry Pi & all SPI-capable boards

₹120.00 (Incl. GST)

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100 in stock (can be backordered)

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+91 9550421866

SKU: KSP-RFID-RC522

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Description

RC522 RFID Reader Writer SPI Module with Card & Tag

The RC522 RFID module is based on the NXP MFRC522 IC — a highly integrated, low-power 13.56 MHz contactless communication chip. It supports ISO/IEC 14443A / MIFARE and communicates via SPI at up to 10 Mbit/s. This module is widely used in access control, attendance systems, smart lockers, and IoT security projects.

Specifications

Model	MFRC522 (NXP)
Operating Frequency	13.56 MHz
Supply Voltage	3.3V DC only (do NOT use 5V)
Operating Current	13 – 26 mA
Idle Current	10 – 13 mA
Interface	SPI (up to 10 Mbit/s)
FIFO Buffer	64 bytes
Read/Write Distance	Up to 50 mm (typical 20–50 mm)
Protocol	ISO/IEC 14443A, MIFARE
Max Transfer Speed	848 kBd
Board Dimensions	60 × 39.5 mm
Weight	20 g

Features

Highly integrated analog circuitry for demodulation and response decoding
ISO/IEC 14443A / MIFARE standard — compatible with most commercial RFID cards and tags
SPI interface up to 10 Mbit/s — fast, reliable for real-time applications
64-byte FIFO buffer for efficient send and receive operations
Flexible interrupt modes for low-overhead MCU integration
Software power-down mode for battery-powered deployments
Programmable timer, CRC coprocessor, and internal self-test
2.5V to 3.3V supply range

How It Works

The RC522 generates a 13.56 MHz electromagnetic field via its onboard antenna. When a compatible RFID card or tag enters the field (within ~50 mm), it powers up inductively and exchanges data with the module. The MFRC522 decodes the response and passes the card UID and payload to the host microcontroller over SPI.

Common Applications

Door access control and smart lock systems
Student and employee attendance systems
Library book and asset tracking
Smart locker and vending machine authentication
Contactless payment prototypes
IoT identity verification and security projects

SPI Wiring Reference

RC522 Pin	Arduino Uno	ESP32
SDA (SS)	D10	GPIO 5
SCK	D13	GPIO 18
MOSI	D11	GPIO 23
MISO	D12	GPIO 19
RST	D9	GPIO 27
GND	GND	GND
3.3V	3.3V	3.3V

⚠ Warning: Always connect VCC to 3.3V only. Connecting to 5V will permanently damage the module.

Package Contents

1 × RFID RC522 Reader/Writer Module
1 × Blank ISO RFID Card (1K S50)
1 × Keychain RFID Tag
1 × Straight pin header strip
1 × Right-angle pin header strip

Additional information

Weight	0.022 kg
Dimensions	6 × 5 × 3 cm
Model	MFRC522 (NXP)
Operating Frequency	13.56 MHz
Supply Voltage	3.3V DC (do not use 5V)
Operating Current	13 – 26 mA
Idle Current	10 – 13 mA
Interface	SPI (up to 10 Mbit/s)
Read/Write Distance	Up to 50 mm
Protocol	ISO/IEC 14443A, MIFARE
FIFO Buffer	64 bytes
Board Dimensions	60 × 39.5 mm
Weight	20 g
Compatible Boards	Arduino, ESP32, Raspberry Pi, NodeMCU