In this project we were looking for any kind of an access card system for the office open source there's a lot of alternative project which talk about this with more details me i am going just to present them to you so late start
A door access control system that is more accessible to the world. ForkPi stands for Fingerprint, OLED, RFID, Keypad, and Raspberry Pi.
What You'll Need:
It supports five different authentication mechanisms involving three factors: RFID, fingerprint and PIN. The single-door access control provided by SpoonPi easily scales to multiple doors via the accompanying web app, ForkPi, which provides secure, centralized management of multiple SpoonPis over a local network.
for more details