You may have already seen Matt Richardson’s wonderful Snail Mail Push project. Our Arduino projects guy, Riley Porter, has put together a snail mail hack of his own. His new workshop is in his backyard, far from his mailbox. Rather than having to walk to the box obsessively to see if mail has arrived, he developed a prototype for this wireless device that alerts him to the mail’s arrival. It’s a wireless Arduino system with a photoresistor sensor that detects when the box is opened and alerts Riley, via a wireless connection and an Arduino, in his shop.

See Riley’s project featured on the Make: Arduino page

More:
Snail Mail Push Alerts