A student has an ambitious project idea: A quad-helicopter drone with an underbelly security camera mounted. The idea is to mount sensors around the house, then dispatch the quad-heli to the tripped-sensor area. This would avoid having to place multiple cameras around the house to capture various vantage points. Plus it would be a fun way to learn. So to point him in the right direction, here is where we need help:
1. Recommendations for battery-powered wireless motion sensor. I don't think it would be practical to wire the sensors to the Pi.
2. Have a wireless-receiver (unknown frequency) that could receive the signals from the motion sensors.
3. Attach the wireless-receiver to the Raspberry Pi to interpret the signals. The Raspberry Pi would then provide GPS coordinates to the drone.
4. A bit off-topic, but any advice on a quad-heli in the price range of a student?
RPiWare.com - Expansion Boards designed specifically for the Raspberry Pi.