From FENECON-side we do not enforce implementation of RS485-connected Wallboxes, because in most cases they are not compatible with our systems.
We are currently working on a read-only implementation of “ABL eM4”. But I don’t think that is compatible with eMH1.
Yes, it’s already there and working nicely. I use it personally since a few months. But it does not yet have all the features of the old EVCS implementations. Details → openems/io.openems.edge.evse.api at develop · OpenEMS/openems · GitHub