RFM door or window status monitor

This is a housing for a battery powered Arduino Pro Mini with a Omnipolar hall sensor.

Here's the post that has instructions for the bulid http://homeautomation.proboards.com/thread/523/joshs-thread-rfm-builts-cases

Backstory:

Starting with the Instructables post by Eric Tsai (https://twitter.com/Eric_1100). I found inspiration with DIY home automation. Computourist (https://github.com/computourist/RFM69-MQTT-client) cleaned up the programming and added the ability to transmit to end