Most recently I developed a combination lock that opens the garage door. The idea isn’t original, it is based on [Alan Parekh’s] button code project, but I did develop my own hardware and ...

Whether you’re cleaning your kitchen after a big meal or finishing a painting project, it can be tempting to pour just about anything liquid—or sometimes even solids—down the drain.

We find keypad-operated door locks to be convenient. These models allow you to create codes for temporary access ... a wide range of products, including combination locks, padlocks, and many ...

and the ESP is running code that instantiates a web server that will unlock the door with a few clicks on a web page. Sure, it’s probably not the most secure lock on the planet, and the 5V ...

Through said app, "users can… manage up to 250 access codes" for the keypad as well as track lock history and even "receive customized push notifications." Also: Do you need a smart doggy door?