chip: https://www.amazon.com/gp/product/B01CSTW0IA/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

links

• https://lastminuteengineers.com/how-rfid-works-rc522-arduino-tutorial/
• https://create.arduino.cc/projecthub/Aritro/security-access-using-rfid-reader-f7c746

requires soldering header pins

includes cards

pins

• rfid –> argon
• sda –> A5
• sck –> sck
• mosi –> mo
• miso –> mi
• irq –> no connection
• gnd –> gnd
• reset –> d2
• 3.3v –> 3.3v