===== The shutdown daemon =====

To properly shutdown Raspberry Pi when ignition signal disappears, an electrical line was provided to notify the need to shutdown.
The shutdown daemon, monitors this line (pin 13 on P1 header of Raspberry Pi). When this pin goes low, a shutdown command is issued.

==== Downlaod the daemon ====

Click here to [[http://www.carberry.it/down.php?download_id=691|download]] the shutdown daemon, or follow installation steps below:

==== Install the daemon ====
  
Enter home directory:

  cd

Download the daemon:

  curl -O -J "https://www.carberry.it/index.php?route=download/download/download&download_id=31"
  
Untar the file:

  tar -xvf shutdown_d_1.1.tar

Create directory in /usr/local/bin:

  sudo mkdir -p /usr/local/bin/carberry

Move directory to /usr/local/bin/carberry:

  sudo mv shutdown_d /usr/local/bin/carberry/

Add execution rights:

  chmod +x /usr/local/bin/carberry/shutdown_d/shutdown.sh

Add a new line to the ''/etc/rc.local'' before ''exit 0'' line.\\
Edit:

  sudo nano /etc/rc.local

Add:
  
  /usr/local/bin/carberry/shutdown_d/shutdown.sh&
  exit 0
  
System Reboot:

  sudo reboot
  
==== Check daemon exexution ====

Check daemon execution:
  
  ps aux | grep shutdown

You have to see something like this:

  pi@raspberrypi ~ $ ps aux | grep shutdown
  root      2058  0.4  0.2   2736  1188 ?        S    14:40   0:00 /bin/bash /usr/local/bin/carberry/shutdown_d/shutdown.sh
  pi        2380  0.0  0.1   3568   832 pts/0    S+   14:42   0:00 grep --color=auto shutdown
  pi@raspberrypi ~ $


==== Test the daemon ====

To test the daemon, take a wire, and jump toghether pin 13 and pin 25 of P1 connector on Raspberry Pi.
Raspberry Pi will halt now!.