i just created a pull request https://github.com/openhab/openhab/pull/3110 for a new binding containing the connection to RESOL devices using the VBUS. RESOL devices are mainly used for solar heating systems and sometimes together with the heating system and then rebranded (e.g. by Viessmann).
You can find the WIKI page at https://github.com/openhab/openhab/wiki/Resol-VBUS-Binding which is still WIP. So if you have any questions feel free to contact me.
The JAR file can be found here
Currently it’s developed with openhab 1.7 and hopefully it will find it’s way to openhab 1.8
Keep up the good work.