@mfalkvidd Thanks for the feedback, It got me a bit further.
I have a fresh Windows Arduino 1.6.12 install, and I have download the MySensors Library 2.0 through the Library manager, and I've found MySensors.h and MyConfig.h under \Documents\Arduino\libraries\MySensors

I'm able to compile and upload the RelayActuator but quite a few of the library files seem to be missing in 2.0. DallasTemperature seem to be one of them.-But I struggled with DallasTemperature and some others.

I copied all the whole MySensors-1.5.4.zip library files to to C:\Program Files (x86)\Arduino\libraries, and I managed to compile, but I got an error message saying Invalid version found: 1.04
Then I tried to only copy the DallasTemperature and OneWire folder, and I had no errors.

-So I assume all library files the entire MySensors Examples catalouge are not ready in Libraries 2.0.

Anyways: The solution to get this sensor to work with Arduino 1.6.12, following the Download and API guide, adding MySensors 2.0 through the Library Manager, is to manually add:
\Arduino\libraries\DallasTemperature
\Arduino\libraries\OneWire\

-from https://github.com/mysensors/MySensorsArduinoExamples/archive/master.zip
-And not adding the whole structure.

Now I just have to find out how to make it speak to my serial gateway :satisfied:

It seems the DallasTempereture library is not a part of the default Library setup from Mysensors as of version 2.0? I tried to compile the above code, but I had to manually download DallasTemperature from GitHub first. Then OneWire was also missing. Adding these two libraries brought me a bit further, but I get a long list of errors connected to OneWire. What libraries should be used?

@TimO said:

GitHub Repo
So I´m very new to OpenHAB, but I´ve tried to bind MySensors for a few days now, and I´m stuck. I´d be really happy if someone could guide me a little further.

-I´ve flashed and installed OpenHABian on my Raspberry. (OpenHAB2)
-Managed to bind my Sonos through the paper ui, so the OpenHAB2 install looks good.
-Now I wish to bind Mysensors on a serial gateway.

Looking at the GitHub install guide it seems as simple as adding the MySensors.jar file to the addons directory, but from what I can see, bindings are not managed like that in OpenHab2? All guiding I read seems to refer to another file structure in OpenHab 1.8.
I managed to find an addons directory in /usr/share/openhab2/addons, but I can´t find a way to copy the .jar file there, as I get permission denied both through WinSCP in sudo mode and terminal ssh. The folder has permission 0775.

Can anyone guide me to thread that describes how to install MySensors on an OpenHABian Raspberry installation?