Software apps and online services
My submission for the "Give your Hardware a Home" challenge sponsored by Autodesk.
It's a pretty basic enclosure for the system found here: http://www.hackster.io/tbatey_tiny-circuits/tinyduino-wi-fi-door-sensor
Basically, the idea is take a profile of your door trim, cut out a section, and slip this in its place.
As shown in the animation below, a back plate is screwed onto the wall, and the magnet stuck to the door, aligned to where the sensor will be. Then, the electronics are wired and placed in the large casing, and snapped into place on the back plate. If necessary, wires can be routed through a hole in the top, or through the wall directly.
Pretty simple, but a lot of fun! Everything was designed/rendered/produced in Fusion 360. You can download the file here: http://a360.co/1IfMWLs