An RFID reader and Arduino run the system, with a button inside to unlock the door. But if power were to fail, you will still be able to get in or out manually.

Arduino enthusiasts may be interested in a new gesture controlled Arduino door lock which has been created by Adham Negm and uses an Arduino Uno together with a servo motor to slide the bolt back ...

Build your own IoT smart door lock system using a Nano ESP32 and the Arduino Cloud, courtesy of this Gadget Master.

An unchanged credential allows anyone to virtually control door locks and elevators at dozens of apartment buildings across North America, a security researcher found.

Perhaps you could create an Arduino device to lean on the door right before the Arduino device bolts the door. It's not clear if the lock unlocks the door when you close that incognito browser.

This proves that you have access to the secret, and can only be used once. To secure his Lego mini-figures, [Luca] built an authentication system using Google Authenticator and Arduino.