Why do simple things like this always get so much more attention than other, more complex things (at least event based). The entire thing is simplistic. Even the keypad, which I assume has been hard "wired" to have only a fixed password, or maybe it uses addon events, is simplistic.
A build I posted a while back about a keypad that actually allowed you to change the password with prints, and connect it simply to any other brick, such as a door, got only 4 posts.
Basically, what makes this so special?