Mini RFID Reader/Writer Unit (MFRC522)


Regular price $12.50
Shipping calculated at checkout.

10+ In Stock


RFID has an RFID MFRC522 chip inside.

The MFRC522 operates in the 13.56MHz frequency band and uses the modulation and demodulation principle to interact with the proximity RF card. This unit can realize the function of the card reading and writing device, to identify and record multiple card information, to encode and authority a RF card.

It is able tp establish applications such as access control system, punching system, warehouse goods storage and community vehicle access registration.

Connect this Unit to GROVE PORTA on M5Core, I2C address is 0x28.

Product Features

  • 13.56MHz Operation frequency
  • I2C data rate: Fast mode: up to 400 Kbit/s; High-speed mode: up to 3400 Kbit/s
  • RC522 Transceiver Buffer: 64 bytes
  • Supported protocol: ISO14443A, MIFARE and NTAG
  • Operate temperature: -20℃-85℃
  • How long data be saved for: > 10 years
  • Reading and writing distance: < 20 mm
  • Program Platform: Arduino, UIFlow (Blockly, Python)
  • Two Lego installation holes


  • 1x RFID unit
  • 1x GROVE Cable


  • Smart home access control system
  • Vehicle management
  • Smart transportation
  • Smart bookshelf


Resources Parameter
Communication protocol I2C: 0x28
Net weight 6g
Gross weight 21g
Product Size 48*24*8mm
Package Size 67*53*12mm

Customer Reviews

Based on 10 reviews
Great product and form factor

I’ve tried various RFID boards (cheaper and expensive ones) before. This is one of my favorite ones. The packaging and form factor are great for my POC. Range is definitely a compromise but works for my need.

Mini RFID Unit

Works great as a reader, haven't tried writing yet, but if that works as good as the reading, should be no problems.

fast , all right, and full functionalaty

all parts are fine thx , and all times again

Juan Carlos Abad
RFID module tested with Core, Core Fire and Stick-C without problems

RFID module tested with Core, Core Fire and Stick-C without problems (nevertheless it does not work if plugged thru Pa.Hub, which is obviously an Pa.Hub problem).

Hans-Günther Nusseck
Perfect integration

M5Stack and M5Stick are my favorite development tools. Easy to handle and everything in a box. The MFRC522 worked "out of the box". The available libraries and examples are helpful and well organized...
Exactly what I was looking for!

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