The Yale Approach Lock with Wi-Fi + Keypad is our pick for deadbolt adapter locks. It should work with most any single-cylinder deadbolt, is easy to install, and works quickly and reliably.

With the mechanical portion of the project out of the way, he spent a great deal of time working on the door’s electronic components, including the PIC-based controller and capacitive keypad.

If you want to add a keypad to your Arduino project, the options are pretty limited. There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects ...

Some things don't need to be "smart." Yale's new Code keypad lock costs just $99 and doesn't connect to the internet. It's just a simple electronic lock. No need to worry about apps, software ...