Semi-detached new build, which technology to install?

Hello everyone,
it's finally happening for us as well and we are currently having a house built.
At the moment, we live in a rental apartment and I have the following components:

- Alexa Echo Plus in the living room
- Alexa Echo Dot in the bathroom
- Alexa Echo Dot in the children's room (still to come)
- Various Hue lamps, some with motion sensors

For our house, of course, the latest technology should be installed. What do I want?

- Central control of roller shutters (possibly in connection with daylight and temperature in summer)
- Various controllable lights in the living areas
- Access to possible cameras/lights via mobile phone
- Lights with motion sensors for e.g. basement corridor
- Control heating from outside for vacation etc. (air heat pump)
- Possibly smoke detectors centrally controlled with notifications on mobile phone

Nothing else comes to mind at the moment...

Furthermore, I want to install CAT 7 LAN in every room.
Now I keep reading that everything should be wired with KNX. However, given my requirements, I wonder if this isn't a bit of overkill.
I find voice control with Alexa / Siri and a nice touchpad for visualization very good. But does it still make sense to implement a complete bus system with KNX?

I would be very, very grateful for some tips.
Regards

Christian

Furthermore, I want to install CAT 7 LAN in every room.

I can say little about the home automation system, but I have a few comments about the network.

It's important to plan the entire network well. LAN in every room is already good, but always make a double socket. In places like the TV, maybe make 2 double sockets, as depending on the household there are several devices that want to connect to the network. Don't forget rooms like the hobby room. Also consider the garage or attic, or prepare by installing empty conduits. Don't forget LAN cables for the cameras. Which video door intercom system will there be?

Now about the WLAN. Personally, I am not a fan of the router's WLAN because it usually doesn't have the optimal location in the house, and I also find those devices ugly. I would separate both devices. Mount an access point centrally on the ceiling on each floor and prepare for the outdoor area as well. Personally, I use access points from Unifi.

You should also already plan a place for the network cabinet, so that in the end a 19" cabinet doesn't have no space. The height depends on what should go in. Even if no NAS is planned now, I would reserve space. Back to the LAN cables again. Always make sure they are installed in empty conduits.

How is the implementation of the telephone planned?

What internet connection will you get? Fiber optic, cable, DSL, ...?

Good morning. Then I'll quickly answer the questions. Regarding the front door system, I haven't done much research yet, but I definitely want something with video recording. I also have a NAS from Synology (214play). I think the idea with the access points is very good. Then all devices can really go to the basement. Otherwise, we are supplied by Unitymedia, although I might want to switch to satellite at some point. On one hand, I always think, do it properly with KNX, on the other hand, I think a "good" system from Busch Jäger or something like that is probably sufficient for my needs, right? Of course, not considering the price at all. What about power cables, do I need to pay attention to anything? Not the routing of the cables, but the type of cable, etc. I would be very grateful for further tips.

Well, you have to decide that for yourself. With KNX, you can implement everything relatively easily and it will remain future-proof. This is not true for manufacturer-specific systems. Here, support eventually ends or there is a complete discontinuation and switch to another technology, etc.

Furthermore, with these proprietary solutions you are often dependent on specific end devices and can only use those if you want full functionality. See Philips Hue. It is different with KNX. For example, you can connect and fully control any RGB/RGBW strip.

With Alexa, you have probably already realized that you also need an infrastructure that can then be controlled and monitored. Without it, it is just a slightly better speaker with voice recognition. KNX provides you with this infrastructure relatively easily and everything can be integrated, from simple window contacts to the electric car.

Additional devices like Shellys behind the light switches etc. are great for retrofitting in existing buildings. However, they are also severely limited by the lack of structured wiring and can therefore often only replace the light switches / roller shutter switches and equip them with remote control. But that has little to do with an intelligent home.

...Additional devices like Shellys behind the light switches, etc. are great for retrofitting existing installations. However, they are also severely limited by the lack of structured wiring and can therefore often only replace the light switches / roller shutter switches and equip them with remote control functionality. But that has little to do with a smart home.

Aren't Shellys suitable after all, for example in connection with Alexa, a Raspberry Pi as IOBroker for IFTTT scenarios -> so actually some "intelligence"?
(Of course, only with additional sensors, actuators, and the appropriate wiring)

At least that would be an open system that won't face "shutdown" if a manufacturer no longer wants to support it...

Keyword: Remote control capability. No intelligence.