Fingerprint Lock

This door will lock merely using your fingerprint: enroll your fingerprint, press the button, then it'll go into enroll mode. 
Put your finger on the Grove - fingerprint sensor, if your finger is recognized, it will authorize the opening of the door: Servo will turn the lock and the door will open. When the door is closed, the Grove - Infrared Reflective Sensor can detect it and Servo will close the door.
You can find the code and Acrylic files here.