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====== Raspberry Pi picture frame ======

In this article, we're building a picture frame using a Raspberry Pi and a regular screen.

===== Requirements =====

  * A Raspberry Pi, for example a 1B.
  * SD card
  * Network access
  * Network share for the images (e.g. NFS)

===== Installation =====

  - Install [[https://www.raspberrypi.org/downloads/raspberry-pi-os/|Raspian Lite]] on the SD card.
  - Edit ''/etc/fstab'' to mount the network share. Skip this step if using a local directory.<code>host:/export/media /export/media  nfs4     auto            0       0</code> Replace ''host:/export/media'' with your host and export name. See [[infra:x.antiguru.de|x.antiguru.de]] for NFS exports.
  - Crate a script ''picframe.sh'' in ''/home/pi''. Update ''myfolder'' to point to the correct location.<code>#!/bin/bash
myfolder="/export/media/picframe"
if [ -d "$myfolder" ]; then
 if [ $(tty) == /dev/tty1 ]; then
   find -L "$myfolder" -name *.jpg -type f -print |shuf  > /home/pi/pic1.list
   while [ true ]
   do
     # check if network share still exists
     if [ ! -d "$myfolder" ]; then
       exit 1
     fi
     find -L "$myfolder" -name *.jpg -type f -print |shuf  > /home/pi/pic2.list &
     fbi -a -t 90 --noverbose --noreadahead --list /home/pi/pic1.list
     # this is a hack so after fbi crashes (which it will) the same list isn't
     # shown again from the start
     # check if network share still exists
     if [ ! -d "$myfolder" ]; then
       exit 1
     fi
     find -L "$myfolder" -name "*.jpg" -type f -print |shuf  > /home/pi/pic1.list &
     fbi -a -t 90 --noverbose --noreadahead --list /home/pi/pic2.list
   done
 fi
fi
exit 0</code>
  - Make the script runnable: ''chmod u+x picframe.sh''
  - Now boot the pi from the SD card.
  - Install ''fbi'': ''sudo apt update'', ''sudo apt upgrade'', ''sudo apt install fbi''
  - Configure auto login: ''sudo raspi-config''
  - Append ''~/picframe.sh'' to ''/home/pi/.bashrc''
  - Configure read-only overlay fs: ''sudo raspi-config''