And then I found this;
k-the-hidden-hero/bticino_intercom: 
Bring Back bticino on netatmo API
No need to root, or install anything on the intercom. Just installed the integration using HACS, and it worked on my first try. 
That is indeed the integration I was talking about. Only works on 2.x firmware and works with the Netatmo api
This integration does not work for 1.x firmwares as this hardware does NOT use the netatmo api internally.
What surprised me is that I got the impression from our conversation that “cracking” the 2.x FW would be virtually impossible due to the new Bticino encryption technology - and suddenly here comes a guy that solves the whole thing without as much as any mention of SSH or flashing or hacking. Just plain install! Way to go, if you ask me. And I wouldn’t be surprised if the same is fully doable for the 1.x FW as well if just someone with the right tools and knowledge decided to do it.
It’s always like that with “impossible” things. They remain impossible until someone comes along and does something completely different, and viola, it’s not impossible any more.
(It’s called progress)
You are welcome to reverse engineer the protocols for the 1.x my friend. You make it sound I have not spent hours reversing binary files and trying to make sense of it all.
The 2.x implementation just uses the netatmo api as seen in the android app. It uses the endpoints as seen in the app.
The solution fquinto and me proposed predates all that stuff by at least 5 years and barely uses any public http apis (because there are none).
So please don’t pretend to know what you are comparing.
Nevertheless I am happy you found a working solution for your unit. No need to post anything anymore as I find your tone offensive and totally unrespectful, so I won’t bother replying anymore.
I get the clear impression that you knew all along that your “techy” solution would never work on v2.x FW devices, and now you also say that you knew about the other solution that do work!
Then why didn’t you tell me (and others) about that and I could have saved myself days of impossible work trying to hack my unit to no avail.
So no need to be grumpy. I apologize if you felt me being offensive. That was not my intention.
Because it was added literally 3 days ago.
Ok, by bad then. Sorry for my unfair comments to you. I stand corrected.