I recently was able to complete the tutorial to setup a PIR sensor, found on the website.
Link: http://www.modmypi.com/blog/raspberry-p ... -detection
However, I want to be able to setup a PIR sensor that communicates wirelessly to my Pi. Would I be able to do this through RF communication? I was thinking of attaching a Slice of Radio transceiver to my Pi, but i'm not sure what transmitting hardware I would require for the sensor itself and how to set it up. I want this sensor to be able to be connected to an external power source, free from any microcontroller.
Any help at all is appreciated!