Firmware for the Open Access Standard Rev4 Board used for the Site 3 Door Troll
See http://www.accxproducts.com/wiki/index.php?title=Open_Access_4.0 for the original board information.
You need to copy the directories in /libraries to your Arduino IDE library folder.
Note that using the same reader, and NFC IDs with 4-byte IDs, you will only get three bytes from the Wiegand reader, and they will be in this pattern:
B1 B2 B3 B4 -> B3 B2 B1
So 0x12345678 will become 0x563412.