Hey guys! I've just thought of a neat idea for a summer project, and I'm requesting some opinions on its usefulness and feasibility. For a forgetful guy like me, I always get the feeling (while I'm walking on the streets) that my door is unlocked. So today I was thinking about how to make a device that checks if your door is locked or not. After a minute or so, I thought of a basic design: An accelerometer that is connected to a wireless transmitter (since most doors are deadbolts and require turning the lock to different orientations to lock them). This way, all you would have to do is to stick a non-intrusive modified accelerometer onto your lock! So what do you guys think? Possible issues (Range problem)? Possible solutions to possible issues (making the signal send to a wifi network and uploading the status of your door online)? Ways to design such a device?