This project is to work with rdubigny/home-alarm .
- https://learn.adafruit.com/adafruits-raspberry-pi-lesson-12-sensing-movement/software
- http://pinout.xyz/pinout/pin16_gpio23
- https://docs.python.org/3.4/library/socket.html
- https://learn.adafruit.com/shake-up-a-gift-box/circuit-diagram
- http://raspberry.io/projects/view/reading-and-writing-from-gpio-ports-from-python/
- https://raspberrypi.stackexchange.com/questions/37241/vibration-sensor-what-i-am-doing-wrong
- https://sourceforge.net/p/raspberry-gpio-python/wiki/BasicUsage/
- https://sourceforge.net/p/raspberry-gpio-python/wiki/Inputs/