===== Pi-OGG-Player =====

This is the workaround for a touch screen OGG PLayer based on a Raspberry Pi with the Raspberry Pi Touch Display. 10 of these players were used in the exhibition [[https://www.iwalewahaus.uni-bayreuth.de/de/program/archive/2017/20161104_Stolen-Moments/index.html|Stolen Moments]] at the IWALEWAHAUS in Bayreuth 2017.\\

The OGG file player was made with pygame for Raspbian Jessy.\\
[[http://www.pygame.org/hifi.html]]\\
[[http://www.pygame.org/docs/index.html]]\\

Other Links & Knowledge:\\
[[http://www.nerdparadise.com/tech/python/pygame/basics/]]\\
[[https://www.raspberrypi.org/magpi/issues/essentials-games-vol1/]]\\

IP Address: 192.168.0.123\\
PW:st0lenm0ments
----
==== Sound Card ====
[[http://elinux.org/RPi_VerifiedPeripherals#USB_Sound_Cards]]

----
==== Upgrade ====
  $ sudo apt-get update
  $ sudo apt-get upgrade
  
  $ sudo apt-get install zip, htop
  $ sudo apt-get install python3, python3-pygame, python3-pyqt5, python3-pip, idle

----
==== Rotate the Display ====
[[https://www.raspberrypi.org/forums/viewtopic.php?f=108&t=120793]]\\

  $ sudo nano /boot/config.txt
to rotate the display 270 degree add:  
  display_rotate=3 

----
==== Python Multitouch ====
[[http://forums.pimoroni.com/t/official-7-raspberry-pi-touch-screen-faq/959]]\\
[[https://github.com/pimoroni/python-multitouch]]\\

  $ wget https://github.com/pimoroni/python-multitouch/archive/master.zip
  $ unzip master.zip
  $ cd python-multitouch-master/library/ 
  $ sudo python3 setup.py install

Example:
  import ft5406
  ts = ft5406.Touchscreen()
  
  while True:
      for touch in ts.poll():
          print(touch.slot, touch.id, touch.valid, touch.x, touch.y)

----
==== Read-Only SD Card ====
Change the SD card to a read-only mode.\\
[[http://raspberrypi.stackexchange.com/questions/5112/running-on-read-only-sd-card]]\\
[[https://web.archive.org/web/20150101110424/http://raspberrycenter.de/forum/umruestung-raspberry-pi-read-only-root-filesystem]]\\

=== Fstab ===
in:
  $ sudo nano /etc/fstab
change:
  /dev/mmcblk0p2  /               ext4    defaults,noatime,ro  0       1
  tmpfs           /tmp            tmpfs   defaults,size=30M    0       0

=== Disable some Programms ===
disable rsyslog and dphys-swapfile:\\

  $ sudo systemctl disable rsyslog
  $ sudo systemctl disable dphys-swapfile

=== Remount ===
To remount the partition writabe:\\
  $ sudo mount / -o remount,rw

----
==== USB Sound ====

  $ alsamixer

find the soundcard number:\\
  $ aplay -l
  
in:\\
<del>  $ sudo nano /etc/asound.conf</del>
  $ sudo nano ~/.asoundrc
write (with your card number):\\
  pcm.!default {
    type hw
    card 1
  }
  ctl.!default {
    type hw
    card 1
  }

and in:\\
  $ sudo nano /usr/share/alsa/alsa.conf
change:\\ 
  defaults.ctl.card 0
  defaults.pcm.card 0
to (depends on your number):\\
  defaults.ctl.card 1
  defaults.pcm.card 1

----
==== Stop Blanking ====

Open:\\
  $ sudo nano /boot/cmdline.txt
Addd:\\
  consoleblank=0

----
==== Mount USB Stick ====

  $ sudo mkdir /home/pi/stolenmoments
  $ sudo blkid
  /dev/mmcblk0p3: LABEL="STICK" UUID="A933-7A00" TYPE="vfat" 
  $ sudo nano /etc/fstab
edit:
  #USB Stick on /dev/sda1
  UUID=A933-7A00       /home/pi/stolenmoments/data    vfat    utf8,umask=022,uid=pi,gid=pi  0       0

$ sudo mount -a


----
==== IP and Network configuration ====

=== Enable the SSH Server ===
In Raspian Jessie it should be activated allready. If not enable the SSH server by opening the raspi-config:
  $ sudo raspi-config
In 8. Advanced Options you can activate SSH.

=== Static IP Address ===
Look up your gateway:
  $ netstat -r -n
Find you IP address:
  $ ifconfig
or:
  $ ip addr
Give the Raspberry Pi a static IP address. Open the interfaces file:
  $ sudo nano /etc/network/interfaces
Add these lines after "face eth0 inet dhcp":
      
    # Ethernet
    auto eth0:1
    allow-hotplug eth0:1
    iface eth0 inet static
      address 192.168.0.123
      netmask 255.255.255.0
      gateway 192.168.0.1
      dns-nameservers 192.168.0.1
      
Save and quit, ctl+o, Return, ctl+x.\\

Disable the DHCP-Client:\\     
In Raspbian Jessie:
  $ sudo service dhcpcd stop
  $ sudo systemctl disable dhcpcd       
       
Restart ethernet:
  $ sudo ifdown eth0:1
  $ sudo ifup eth0:1
  
Or/and reboot:
  $ sudo reboot
  
==== Login over SSH ====
One can login from your computer with:
  $ ssh pi@192.168.0.099
or with XWindows support:
  $ ssh -XY pi@192.168.0.099
PW: raspberry\\

=== Miscellaneous ===
If the host key verification failed, one can remove the old key with:\\
  $ ssh-keygen -R 192.168.0.099
And with\\
  ~.
one can terminate a broken ssh session.

----