Hello,
Has anyone done any work/ investigation interfacing to a Caleffi(also sold as Resol and others) Solar Hot water controller? The serial interface is Vbus and they offer an adapter to ethernet. They offer a windowz application to communicate to the controller via aforementioned adapter.
http://www.caleffi.com/usa/en-us/catalo ... 57260a-pv1
http://www.caleffi.com/usa/en-us/catalo ... ce-na15022
Ken B