This is a prototype 'card reader' program intended for use in an access system for opening doors with NFC. Requirements: - a NFC reader that works with libnfc - a MiFare Classic 1K card. - libnfc and libfreefare - libcurl - the accompanying 'backend/server' program - SSL certificate authentication configured on the server, and corresponding copies of the CA and client certificates See http://www.hackmelbourne.org/wiki/index.php/Project/Access_System/Installation_Instructions for more detailed installation instructions There are hooks in action.c for actions that take place when a valid or invalid card is presented. For now, this just involves sending either 'v' (valid) or 'i' (invalid) over the serial port, i.e to an Arduino that blinks a LED. The intention is to have a modular interface so different ways of triggering a door-latch mechanism can be used.