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--- operations:big_screens [2011/12/05 05:25]
Jim Lovell
+++ operations:big_screens [2017/12/05 00:10] (current)
Warren Hankey
@@ Line 1: / Line 1: @@
-The Stairwell displays are run on a Windows Vista (yes,yes, I know) PC called ops3. To access it, start a vncviewer to ops3 wityh the usual password. You can also start up a VNC session to it on ops4 from the "Applications -> AuScope -> Operations" menu.
+===Raspberry Pi Video Display===
-Please power-down the stairwell monitors using the switches under the main desk labelled Screen 1, Screen 2, ... when finishing an experiment or after hours to save power.
+The Stairwell displays are run by four Raspberry Pi mini computers. Communication to the Pis is from the Ubuntu machine, ''auscope-screens''  at 131.217.62.142. User ''auscope'', password the usual.
-==== Powerpoint slide shows ====
+Please power down the stairwell monitors using the switches under the main desk labelled Screen 1, Screen 2, after hours to save power. Please power them up at 8-9am weekdays if you are in the control room. The Raspberry Pi's are shutdown automatically at 4:55pm each day by a cron job on ''auscope-screens''.
-  * {{:operations:auscope_screens_template.potx|Powerpoint template}}
-  * {{:operations:auscope_screens_example.pptx|Example slideshow}}
+The power switch labeled Screen 4 also powers the Raspberry Pi's.
+There are instructions for controlling the displays on the Desktop of ''auscope-screens''. You can ssh or vnc the Raspberry Pi's after first logging into the ''auscope-screens'' machine. The Pi's are on a subnet, quarantined from the uni network, routed through auscope-screens. The Pi's can display video, pdf's, slide shows in pdf format, and can access web pages and resources.
+==Instructions==
+Turn off/on power switches for screens under desk in Auscope room (north west corner).
+[1][2]\\
+[3][4]
+The four pi (and network switch) are connected to switch [4] power, and will boot and loop video when powered on.
+A cron job on ''auscope-screens'' will shut the pi down at 4:55 pm daily (shutdownpi.sh).
+If communication is lost, power cycle Pi's with power switch [4] under desk.
+On boot the pi should start looping through randomly selected movies.
+(play.sh called in /etc/rc.local on pi)
+You can ssh each pi[1-4], user is pi, e.g.
+<code>
+ssh pi@pi2
+</code>
+SSH keys are all in place. Passwords are all the usual.
+You can also vnc each pi[1-4], e.g.
+<code>
+vncviewer pi3
+</code>
+==Network==
+For remote access first ssh into  auscope@131.217.62.142, then ssh the pi
+Outside internet access for the pi's is achieved by forwarding all packets through the ''auscope-screens' machine.
+It appears to the outside world that all traffic emanates from 131.217.62.142
+More detail on the networking of the screen computers is in pi_network.txt on the ''auscope-screens'' Desktop.
+==Software==
+useful software on pi:
+omxplayer (video)
+gpicview  (lightweight image viewer)
+epiphany (web browser)
+Turn off screen blanking on pis with this line in /etc/lightdm/lightdm.conf under
+<code>
+[SeatDefaults]
+xserver-command=X -s 0 dpms
+</code>
+Start x programs on startup in /etc/xdg/lxsession/LXDE-pi/autostart
+Epiphany-browser full screen, F11

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