Lately, My room mates have been very untrustworthy (found $40 missing). At work we monitor sensors that let us know when a door or Rack Cabinet is opened. Unfortunetly they wont tell me the specifics due to security reasons.

Want I want to do is hook a simple magnetic sensor to the door, and have my server send me an email of when it is opened. Also have it maybe start snapping a picture every second for a few minutes through a webcam.

If anyone has any recommendations on the simplest way to do this, please let me know.