Get SmartMeter data through the com interface
follow this link http://eclipsesource.com/blogs/2012/10/17/serial-communication-in-java-with-raspberry-pi-and-rxtx/
and this one http://jlog.org/rxtx-mac.html
yum install rxtx
Added the option to create a fat jar: https://github.com/johnrengelman/shadow
when problems read this : http://stackoverflow.com/questions/22164784/noclassdeffounderror-could-not-initialize-class
if you get : java.lang.NoClassDefFoundError: Could not initialize class gnu.io
Make sure this or something similar is done : ln -s /usr/share/java/RXTXcomm.jar /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/RXTXcomm.jar