The inspiration for this project was simple. My daughter has a habit of forgetting her house key, and we’ve had mixed results with the wireless garage door opener keypad. Time for a new solution. Plus, it’s a great excuse to play with electronics!!! She has an iPhone and it never leaves her side, so that seemed like a reasonable interface to use. Plus, if I network attached it, I could do some other nifty things like control it from the office.