Please stop helping me now. Now i have pidome and the first sensor is running after 30 minutes with my ethernet mqtt gateway 
That is what i want. Maybe one day there are nice tutorials for Openhab. Thank u very much for trying to help. If i now start with mosquitto to get openhab run is the same as when i make a patch for a patch....
It seems that pidome has wait for me it is really nice and not much complicated.
This thread can be closed here.
Thank u anyway for your help @tboha . I think this is too much complicated. I tried ur last idea, but i got connection refused error. Really frustrating.... I want to see results. I hope pidome gave me faster results than openhab.
@John Thank u very much. I think i will stop with Openhab and give PiDome a try. it seems to be better described what to do to get it run.
In the thread u mentioned i looked for some examples but didnt get them to work and no one could help.
@b0rmann Please read the whole thread and tell me what to do now!!! I only want openhab and mysensors work together. But i want to use my mqtt-ethernet-gateway. Not the serial way.
Good morning community.
Here is what i did now for installing mosquitto on my raspberry pi.
This infos are from here (http://jpmens.net/2013/09/01/installing-mosquitto-on-a-raspberry-pi/).
curl -O http://repo.mosquitto.org/debian/mosquitto-repo.gpg.key
sudo apt-key add mosquitto-repo.gpg.key
rm mosquitto-repo.gpg.key
cd /etc/apt/sources.list.d/
sudo curl -O http://repo.mosquitto.org/debian/mosquitto-repo.list
sudo apt-get update
sudo apt-get install mosquitto mosquitto-clients python-mosquitto
Now mosquitto is running.
With:
sudo /etc/init.d/mosquitto stop
I can stop it.
With
sudo /etc/init.d/mosquitto start
I can start it.
But what to do now???
How do i connect mosquitto to my MQTT-Ethernet-Gateway?
How do i connect mosquitto to Openhab?
Please help!
Thank u for your answers.
I love the look of openhab. So i will try the it with mosquitto.
If it will not work then i will try pidome and serial gateway.
If i have new infos i will post them here!
Hmm, now i am nearly at the beginning. It would be nice if i dont need mosquitto.
Maybe here are others who can help.
Thank u anyway for ur help.
Are we both the only who want to use openhab???
Is there no other way to check if openhab recieves the messages from the broker (ethernet gateway)?
@John
I use MyMQTT on my smartphone is this a client? There are messages coming in.
Do i need mosquitto for make mysensors work with openhab or not. Thats the only thing that is interesting for me at the moment.