Question: Zewotherm High Power Single Heatpump / MH Fujitsu Waterpump - Integration

Hey everyone,

I’ve recently set my HA instance up on a spare Raspberry Pi 4 and am currently in the process of adding all my devices to it.
However, I have a question.
I have a “Zewotherm High Power Single” heatpump / “MH Fujitsu Waterstage” which I would like to add. It’s a heatpump for warm water + underfloor heating.
Sadly, I can’t find any way besides buying the 750€ webserver-addon for it.
Has anyone found a way to do it without this addon? I have no problem with some tinkering - if necessary.

Thanks in advance!