To tackle this problem [Lewis] assembled an NFC computer unlocker by using an Arduino ... The main program basically scans for nearby NFC cards, compares their (big-endianned) UIDs against ...

Powered by “a nice little NFC EEPROM from NXP”, (the NT3H1101) the business card even has an energy harvesting mode. Moreover, one can interact with the card via four buttons and an LED.