I couldn’t find any concrete information on using the Undecoded data from RFXCom bindings. I’ve put together a quick tutorial here, I’d love any feedback. When the Undecoded feature makes it into a release (currently in 1.9.0b3 and not in v2 at all), I’ll look at migrating it onto the wiki.
Hello!
Dear Jamstah, I was looking for something exactly like what you describe!
Unfortunately I couldn’t find the beta 3 version of the binding you mention.
Can you please help me?
Thank you.
Warm regards,
Frederico
They don’t make it easy 
Try this link: https://bintray.com/openhab/mvn/openhab/1.9.0.b3/view#files/org/openhab/binding/org.openhab.binding.rfxcom/1.9.0.b3
Urgh, that link seems to sometimes work, but not always. If you click on the files tab then paste the link again it seems to get there.
Here’s a direct link to the jar in case it helps:
https://bintray.com/openhab/mvn/download_file?file_path=org%2Fopenhab%2Fbinding%2Forg.openhab.binding.rfxcom%2F1.9.0.b3%2Forg.openhab.binding.rfxcom-1.9.0.b3.jar
Thanks, this one worked!
I’ll give it a try tonight!
Frederico