1) I wanted to show a approach that there exists a possible solution to connect the atag zone to third party software.
2) Maybe you can find a working apple homekit integration for Domoticz and read data for your needs. Homekit Siri could be a possible solution after a quick google research.

Hi all, I found a possible solution for my side. So I'm working with homeassisten and it is working for me to connect locally via homekit to the atag zone one boiler. Now I'm able to configure custom automations for example: leave the home -> switch heating temperature to 15 degrees Steps to ...

Hi mvveelen,

I also got a new atag zone boiler and I was wondering if you found out something new

Regards