Linking to the roboport was exactly what I was looking for initially to get the content of the whole logistics network, but I could not figure out how to do it. Thank you!
I've seen some other smart furnace setups before, but nothing with the new abilities since 0.13 yet. So i've decided to give it a try and build my own. The build is extendable and quite compact so you can just add more and more modules. The combinator / logic part is only needed once ...