hi @stefdewilde,
I’m starting the integration now, but it’s not complete. The first step was the library (and CLI tool) I shared that allows us to expose the UltraSync Hub in a way that we can be communicated to (and monitor) it via a API; this part is done! 
. You can use this tool (as is) right now if you want.
I haven’t done a pull request to Home Assistant yet, but I have begun the process here.
It’ll be pretty basic at first, but I’d like to be able to send away, stay, and disarm through HomeAssistant. I also want my initial release of this integration so that we can set up triggers to automatically arm the alarm (as stay) at night and disarm in the morning (as an example). As I make progress, I’ll share here. Please know that this is kind of an overwhelming undertaking, so please be patient; if you can help, by all means feel free too! 