RFID-RC522 RFID Kit Reader Writer MFRC522 IC Card Keyfob New UK Stock UK Seller


This great RFID kit contains a combination reader/writer module powered by the popular MFRC522 chip, and comes with a RFID card and a RFID keyfob.

We can optionally also supply straight or right angle headers for easy connection to the board.

The MFRC522 supports contactless communication at 13.56MGHz. It is compatible with MIFARE Mini, MIFARE 1K, MIFARE 4K, MIFARE Ultralight, MIFARE DESFire EV1 and MIFARE Plus RF, and connects to your microcontroller over SPI or I2C.

Powered from a 3.3V supply, it is ideal for use with Arduino, AVR or ARM processors. It can also be used with common PICs with the use of level converters.

The pinout of the chip is as follows:

  1. SDA: Serial Data for I2C (marked with a square solder pad)
  2. SCK: Serial Clock for I2C
  3. MOSI: Master Out Slave In – for SPI
  4. MISO: Master In Slave Out – for SPI
  5. IRQ: Interrupt – this pin has multiple functions and should be connected to an interrupt pin on your microcontroller
  6. GND: Ground – connect this to ground or 0V
  7. RST: Reset – when held low the chip is turned off. Chip resets and powers up on a rising edge
  8. 3.3V: Module power supply – connect 2.7V to 3.3V to this pin

This module is not 5V tolerant. Using a 5V supply and 5V logic levels may damage the chip! Each module will be tested prior to despatch.

For more information on the MFRC522 chip, please see the MFRC522 datasheet: Download Datasheet

Please read and note the following before ordering:
1) My Shipping is for UK Mainland ONLY. No Scotish Highland, Northern Ireland, Isle of Wight or other Isles. Some areas may incur additional costs, if you are unsure please contact me prior to ordering.
2) Please ensure you have a valid contact phone number, I may pass this number onto the Carrier for delivery. No refund for carriage cost will be offered, if delivery is delayed as a result of no valid contact number being provided.
3) I welcome collection for orders,please select collection on checkout otherwise your order will be despatched. Once your order has been picked and tested if applicable. We will then inform you of a date and time for collection. Please bring your payment card for verification when collecting your order. No order will be released without card verification.
4) I am unable to provide ANY technical support, please ensure you fully understand how this item works by checking for any datasheets (not provided with the item), to enable the product to be used within your application / project.
5) VERY IMPORTANT >> Do not make ANY permanent connections. Please test the item BEFORE making any permanent connections e.g. soldering to the item. Please ensure you have the means to test the item WITHOUT applying ANY solder to the item. If an item has any solder applied I will NOT accept any return.
6) When upgrading to 1st class post, (if the option is available), please note this is sent via Royal Mail and is not a guaranteed next day service. If you need a 48hr service please select 48hr delivery at extra cost. This will be sent via Royal Mail or courier. I do not offer a 24hr service. No weekend or public bank holiday deliveries.
7) We attempt to send out all orders received before 10.00am. This excludes weekends and public holidays.
8) Customers placing multiple orders. – I may ship all the orders as one, please do not ask for a refund of shipping cost after you have placed your orders. Please do not place your orders if you want a refund of shipping cost.
9) Some items may have a “Warranty Void if removed” sticker, please DO NOT tamper or remove these stickers. I will not accept any rertuns with tampered or removed sticker. Some buyers have tried to send back items that I have not supplied.

**** Important note **** Some sellers claim the stock is in the UK, please be careful, the seller is often in China and sends the item to a UK agent who then forwards the item on with a UK stamp. Check where the seller is located not just the item location. All my items are physically with me, here in the UK and I offer a quick delivery and communication within the UK.

During busy periods there maybe a delay in delivering your package by Royal Mail. I apologies in adavnce for any inconvenience but would like to point this out before you place your order.