Review on 🔍 Advanced SunFounder Mifare RC522 RFID Reader IC Card Proximity Module for Arduino - Enhanced Antenna RF Module for Efficient Card Reading by Mark Powell

This product is compatible with Raspberry Pi, which is amazing. I had some starting problems but I got over them. The pins to and from the rpi are as follows: VCC - pin 1, 3.3 volt RST - pin 22, GPIO25GND - pins 6, 9, 14, 20 or 25, personally I have used pin 6, MISO - pin 21, GPIO9MOSI - Pin 19, GPIO10SCK- Pin 23, GPIO11NSS- Pin 24, GPIO7IRQ- Don't Attach to rpi I used: http://bsd.ee/hadara/blog/?p=1017&cpage=1#comment-845 and it was extremely helpful. Hope this helps others: I'm giving this a 3.5 mainly due to the lack of documentation for both Arduinos, although the link to box.com is in the description it's not exactly helpful. Not to mention the NO info for Rpi.