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RC522 RFID Reader Kit 13.56MHz – Card, Key Fob and Headers

RC522 RFID Reader Kit 13.56MHz – Card, Key Fob and Headers to Pinterest (opens in a new window)
RC522 RFID Reader Kit 13.56MHz - Card, Key Fob and Headers

Brand NZN Electronics CLICK IT SKU CLICK-IT-199270 Category Cards & Gift Wrap

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  • Brand NZN Electronics

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Overview

An RC522 RFID reader kit for reading and writing 13.56 MHz cards and key fob tags with an Arduino, ESP32 or Raspberry Pi Pico. The reader connects over SPI and comes with a blank card, a key fob tag and two 8-pin headers, so you can read your first card number as soon as a header is soldered on. It runs from 3.3V: on an ESP32 or Pico it wires straight across, and on a 5V Arduino you power it from the 3.3V pin.

Specifications

Reader chipRC522, 13.56 MHz, ISO/IEC 14443 A
Reads and writes1K S50 type cards and fobs, 4K S70 and NTAG21x type tags
Does not read125 kHz tags such as EM4100 door fobs
Supply3.3V only (3.0 to 3.6V), under 100 mA
Logic level3.3V, not 5V tolerant
InterfaceSPI, up to 10 Mbit/s, plus IRQ and RST
PinsSDA, SCK, MOSI, MISO, IRQ, GND, RST, 3.3V
Board sizeAbout 40 x 60 mm, 4 holes for M2.5
SoftwareMFRC522 Arduino library, ESPHome rc522_spi

Datasheets

Full technical datasheetPDF
Quick Start: wiring and test sketchPDF

What’s in the box

1×
RFID-RC522 reader board

Header holes empty, ready for you to solder the header you prefer.

1×
Blank white card

Credit-card size, 13.56 MHz, no printing.

1×
Blue key fob tag

On a silver split ring, 13.56 MHz.

2×
8-pin male headers, 2.54 mm

One straight and one right-angle, loose. Jumper wires and the microcontroller are not included.

Great for

Unlock a box or door with a key fob
Log who arrives and when
Start a machine only for a known card
Tap-to-play music or a playlist
Trigger Home Assistant scenes from tags
Learn SPI with an Arduino or ESP32

Wiring & getting started

  1. Fit a header

    Solder the straight header to stand the reader in a breadboard, or the right-angle header to lie it flat. Solder all eight pins.

  2. Wire it to 3.3V

    3.3V to 3.3V and GND to GND. On an Uno or Nano: SDA to D10, SCK to D13, MOSI to D11, MISO to D12, RST to D9. On an ESP32: SDA to GPIO5, SCK to GPIO18, MOSI to GPIO23, MISO to GPIO19, RST to GPIO22. Leave IRQ unconnected.

  3. Install the library

    In the Arduino IDE open Tools > Manage Libraries, search MFRC522 and install it.

  4. Read a card

    Upload the test sketch from the Quick Start, open the Serial Monitor at 115200 baud and lay the card flat on the antenna. Its number prints straight away.

Note: A 5V Arduino sends 5V on SDA, SCK, MOSI and RST. Most readers cope, but for a build you will keep, fit a level shifter or a 1 kΩ and 2 kΩ divider on those four wires. The datasheet shows how.

Specification

Specification for RC522 RFID Reader Kit 13.56MHz - Card, Key Fob and Headers
CLICK IT SKU CLICK-IT-199270
Brand NZN Electronics

Features

An RC522 RFID reader kit for reading and writing 13.56 MHz cards and key fob tags with an Arduino, ESP32 or Raspberry Pi Pico. The reader connects over SPI and comes with a blank card, a key fob tag and two 8-pin headers, so you…

  • Brand NZN Electronics

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