New build - which SmartHome system?

Exactly. However, this would be SIGNIFICANTLY cheaper if one accepted a second app for door communication. Or one accepts compromises in the "customizability" or "aesthetics" of the whole. Based on the expressed wishes, one ends up with, for example, the HS, or PEAKnx/Youvi – or one uses something from the DIY corner. On third-party devices (not, for example, manufacturer-owned touchscreens) there is a small additional app for door communication that appears exclusively when someone calls. It then looks like a FaceTime call and is not perceived as an "additional app" at all. However, a fully integrated solution is demanded here and alternatives (Eisbär) are not desired. Therefore, one stays with Gira and that is, after all, one of the most expensive providers, but unfortunately by far not the best for something like this. The expensive part of the whole thing is precisely the home server and its commissioning as well as the door intercom (with its very modest video quality).

Back to square one: I don't want everything from a single source or no additional app. I would simply like a functioning system. What would the alternative look like?

Wanted Monolith, Doorbird, Akuvox, Goliath, etc pp

Back to square one: I don't want everything from a single source or an additional app.
I would simply like a functioning system.

What would the alternative look like?

I haven’t gone through the whole thread and maybe suggestions that come close to the solution we are now aiming for have already been mentioned, because: We faced the same problem.

What was desired was a "smarthome" (whatever we and others understand by that). We wanted at least to be able to control lights and blinds with it, FP at the door, possibly a video intercom, PM, etc. The wishes grow with the realization of what is possible.
Also voice control via e.g. Alexa (where sensible and possible)
Of course, photovoltaics + battery and charging system should also be integrated.

Our basic data were:
• Open system (no proprietary / cloud obligation etc.)
• All active components centrally located in the distribution board if possible
• No "bus switches" but "normal" Gira, Jung etc. push-buttons
• Affordable!
• Basic programming may be somewhat complex (professionals), afterwards the system should be adjustable by "technically not clueless" users (GUI) (This point alone can lead to days of discussions)
• We do the wiring and programming ourselves (my brother as well as one of our partners as software developers and I as IT specialist)
• The wiring will be carried out with plenty of reserves and smart home suitability.
-> Lighting circuits (lamps) all go directly to the distribution board
-> Sockets going room-wise to the distribution board and wired with 5 cores / three phases so that nearly every socket can later be switched by small changes in wiring.
-> All push-buttons are led directly to the distribution board via (plenty of) LAN cables
(Discussion about CAT7a/CAT8.x as LAN or 10DA etc. was held: result: Almost everything will be executed as CAT7A duplex because this is basically easier for us to process and cheaper to buy

The result will be installed soon as a prototype in my residential unit (half a semi-detached house = about 60m²). The photo of the small distribution board is only a small part of the test system currently being built! The Eltakos were only included for comparison (space requirement compared to the Controllino) and will probably not be installed in the finished system.

Almost everything that speaks any language suitable for smart home can then be integrated into the system via appropriate "bindings."

The actual hardware (brain of the system) will cost only about 1000 - 1500 euros. Mainly consists of the smart home manager (Raspberry Pi) and Controllino Mega pure (Arduino).

The programming of OpenHub etc. (open source) is done by our software developers / programmers.

Temperature, distance meters, motion detectors, humidity, CO2 sensors, etc. can easily be integrated. Also smaller touchscreens (20€) usually cost only a few euros as "cornerstone components," for example.

I will gladly report on the system (and our house) when it progresses further soon.

Just start a new thread where you share your experience including costs, possibilities, functions.
Preferably supported by images of the cable installation and devices, etc.

Wanted Monolith, Doorbird, Akuvox, Goliath, etc pp

And what is the problem implementing that with me? So where exactly do feasibility and expectations clash?

The Eltakos were only included as a comparison (space requirements compared to the Controllino) and will probably not be installed in the finished system.

A Controllino, very nice. It’s been a few years since I last held one... back then they were brand new. Can you switch enough load with it? Certainly great for lamps, but probably not for a stove or oven?

The programming of OpenHub etc. (OpenSource) is done by our software developers / programmers.

I think DIY systems are great. But it gets difficult if you haven’t understood everything yourself and rely on other people or let others do it. Then something breaks and, for example, you can’t install the software yourself on the new Controllino.