Simple daemon to monitor a Raspberry PI B/B+ gpio pin and safely shut it down when the button is pressed. This file is part of Casa-Automata http://casa-automata.com
Requires WiringPI: https://projects.drogon.net/raspberry-pi/wiringpi/
Modify the GPIO_IN define to change the pin number to the one you use. By default GPIO 21 is used (pin 40) on B+
To compile it on Raspberry Pi B+:
gcc shutdown_daemon.c -l wiringPi -o shutdown_daemon
To start, stop or see the daemons status:
./shutdown_daemon start|stop|status
Hold the button for at least a second for the Raspberry Pi to start shutting down
B+ Schematic
The whole setup:
