Raspberry Pi Bluetooth In/Out Board or "Who's Home"

Here's a story that I read:


I wanted to create an electronic In/Out Board. The type you may have to record who is present or not in a company or home. It is usually placed by the front entrance so anyone can see who is in or out.


via Pocket http://www.instructables.com/id/Raspberry-Pi-Bluetooth-InOut-Board-or-Whos-Hom/