How to integrate Zehnder Comfospot 50s into HA (maybe without cloud API)

Hello to the HA World out there,

i’m pretty new to HA and finding myself in a position where i am renovation oour new family home. So i started to build a smart home base for our little family. Now due to many factors i was forced to buy Zehnder ComfoSpot50 ventilators and since i will start using them the next couple of weeks my question would be, if anyone has an idea how to integrate them into HA.

I also bought a Connect Box to have app accessablity, but wether integrations nor a lot of tips are out there.

FYI
Using a Rasberry 5 Pi with HA OS on it.

I already contacted the Zehnder support, which gave me access to the cloud API data. (But to be honest, the cloud is not the ideal way to control these fans)

Actually i just need simple feature like fan speed set, activating and deactivating features like summer ventilation and winter mode.

Maybe someone has an idea or already has done a similar thing with these products…

Thanks a lot,

Best Peter