Subsequently we made a small daughter board that plugs in and provides 8 button interfaces that are all "data" isolated from each other.
Sounds great - is it a commercial product?
Is it a lack of ethernet connectivity that is why your current solution is isolated?
Yes - the (early) stuff I am using has no provision for ethernet, or any sort of connectivity once it is programmed.
You have PM coming your way julf, I can't post the PDF publically because it contains some data that it shouldn't.
Many thanks!