Hack Your Apartment: Keyless Entry with Little Effort

A typical buzzer for an apartment complex.
A typical buzzer for an apartment complex.

If you’ve been to an apartment complex with a locked front door, you’ve seen the buzzer systems. You press the corresponding button for the apartment you want and can talk to the resident. They can press a button to unlock the door briefly, and then you go¬†up to their apartment and they don’t have to come down to let you in. But what if you’re the resident and you want to go for a run without your keys jingling in your pocket? What if you want to open it using just your smartphone?

I knew this was a silly problem, and everyone I told about it thought that for the amount of time and effort it might save, it was hardly worth it.

Challenge accepted.

How fast can I put this together using only parts I have around the apartment? Turns out about 2 hours.

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