[aequitas]

With locks it's kinda reverse that a homebrew solution might actually be more secure than a commercial one (consumer grade at least). Mostly due to security by obscurity. The average thief won't take the time to reverse engineer your lock solution but just pick the next best break-in option which would be smashing a window or breaking the lock/frame. (Unless of course you have really dedicated enemies that want to specifically get something, but then no solution would be perfect. They will just bash your door in with an axe). But a thief might scan for Bluetooth signatures of known broken lock systems and just do drive by brake ins that way.

I'm thinking of building a elektronic lock solution myself because it would actually increase security for me. As currently I often neglect to lock the doors when going to the back of the yard. Mostly because I don't have the key on me. And my kids are at an age that they will still neglect it for many years. A quick drive-by thief could be in and out in no time. An electric lock with a rfid and keypad would be a proper solution as it always locks when you close the door and are never locked out (unless the power fails but then you use a backup key stored somewhere safe).

[buran77]

An electronic lock doesn't have to be impenetrable, just take more than 5 minutes to break into. This is about as long as a determined thief might spend picking/breaking your regular lock before they're in or they move on to the next target. If you add a bit of obscurity in the mix you could be just as safe. A smartlock that looks like a regular lock, or has all the "smart components" on the inside of the door (like smart bolt-on key turners) would not stand out.