- old USB GSM modem stick ( unused, collecting dust in a drawer )
- ordinary USB Webcam
I have http server already running on RaspberryPi.
I can communicate with Modem via minicom (/dev/ttyUSB0), so I will write a simple program that sends SMS using AT Commands.
I can get pictures from webcam , so I will put it, so it can be viewed on web.
Or even send to me via email.
I can access gpio, so I can detect if doors were open...
Or maybe I will connect a movement sensor to it (similar that one used in stairways, to turn the light on and off).
I will put more info later!