Wifi to 868 MHz home assistant compatibile?

Hi guys. I need to control a windows opener that is controlled by a push-button and by remote control.
I am leaning toward using the remote capability because this opens and closes the windows without the need to continuously push the button like the hardware button needs.

So I have to find some device to translate wifi to 868 MHz home assistant compatible.
Any help?
thx
Andrea

Take look on this:

I built this:
http://www.rflink.nl/blog2/wiring
to integrate cheap 433MHz smoke detectors, but they are talking about 868MHz too.
Best regards,

Thank you very much for your answer. I am gonna check it out.