Hallo Anfänger 
This might be important to you:
- first paragraph here: openHABian hassle-free openHAB Setup - #245
- This call for help openHABian hassle-free openHAB Setup - #262 by ThomDietrich
- And finally these instructions to get your Razberry working: openHABian hassle-free openHAB Setup - #263 by ThomDietrich