devoxx/devoxx-signage

Digital signage used at the Devoxx conference.

Devoxx Digital Signage

Digital signage used at the Devoxx conference with Raspberry PIs.

How to install on a PI?

1. In case you use a standard Raspian Jessie distribution, you don't need to install Java yourself, as Jessie ships with Java. Otherwise, install JDK 8 using 'sudo apt-get install oracle-java8-jdk'

2. Install OpenJFX. Download JavaFX Embedded SDK from http://gluonhq.com/open-source/javafxports/downloads/ and install it in the home directory (for example /home/pi/armv6hf-sdk)

3. Copy the JavaFX JAR file and the native libraries to the Java SDK installation directory, e.g.

sudo cp /home/pi/armv6hf-sdk/rt/lib/ext/jfxrt.jar /usr/lib/jvm/jdk-8-oracle-arm32-vfp-hflt/jre/lib/ext
sudo cp /home/pi/armv6hf-sdk/rt/lib/arm/* /usr/lib/jvm/jdk-8-oracle-arm32-vfp-hflt/jre/lib/arm/
sudo cp armv6hf-sdk/rt/lib/javafx.platform.properties  /usr/lib/jvm/jdk-8-oracle-arm32-vfp-hflt/jre/lib/

4. Build the application on a desktop system, using ant

5. Transfer the jar file (dist/Devoxx.jar to the pi) and do the same with the gson-1.4.jar file and the signage.properties

6. Run app on the pi, using

java -cp gson-1.4.jar:Devoxx.jar devoxx.Devoxx room8 signage.properties

Start Digital Signage automatic on PI

You can create an /etc/rc.local file to start the signage app automatically.

#!/bin/sh -e
#
# /etc/rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

ROOM=room9

#
# Start the Devoxx display screen app with the right room
#
echo Starting Devoxx room display for $ROOM
cd /home/devoxx
/opt/jdk8/bin/java -Xmx256m -Dfile.encoding=UTF-8 -Djava.util.logging.SimpleFormatter.format='%4$s: %5$s%6$s%n' -jar Devoxx.jar $ROOM /home/devoxx/signage.properties > /tmp/signage.log 2>&1

exit 0

UI Controls

We've added some keyboard controls when the digital signage application is running.

• Q = Quit application, gives you login prompt
• U = Update display
• D = Update schedule data
• R = Refresh speaker cache
• -> = Increment test time
• <- = Decrement test time