Is Smarthome KNX automation possible based on the floor plan?

well, not for me. I only have 1 floor to live in

OK, then that's something else. But I didn’t want more RCDs, there are already enough .

But that's your "freaks'" problem: it's part of new builds - like all houses without a floor-level shower are on welfare (Hartz4) . It's not part of it and a house does not become less livable because of that - this is implied in many posts here. Whether consciously or unconsciously phrased that way - and at least that always gets on my nerves.

No, it’s not part of it. That’s why my recommendation to the OP was to leave it. Only those who recognize the added value beforehand and are willing to put in the corresponding work will benefit. For others, it just costs more money without "more value."

However, I think that in the future it will tend more towards installing something like this, especially with regard to the energy transition. Today, a heat pump already has to support grid-side shutdown and there are smart meters. In 10 years that will probably be standard and the optional influence possibilities and "saving opportunities" will increase, as will automation in the household. Whether our systems will still be sufficient then remains to be seen. But they could form a basis.

Still, I think it’s great how you educate here – even though the questioner is still approaching the matter incorrectly.

Absolutely correct.

What about the topic of lightning protection? At least in these local areas, there are quite often voltage spikes in the grid due to lightning strikes.

How does one protect the expensive actuators from lightning strikes? They are directly connected to the power supply, after all?

That would certainly have been one of the next questions. The OP wasn’t even into KNX in their own house two days ago, and now they are already asking where the phase and neutral conductor are connected.

You have convinced me. Of course, I would have the wiring done by an electrician, so the question was really more about understanding.

One of the biggest misconceptions is still that KNX is expensive. Anyone who has understood the basics will also understand that the additional costs with functionally comparable equipment are, if anything, only minimally higher. It only gets expensive because of 'show-off' and then it has nothing to do with comparable functionality but is like comparing a duck to a Lamborghini.

That is also an argument for me. Either I massively overestimate the prices of "normal" electrical equipment or the KNX technology is not that expensive. Especially if it doesn’t have to be from an expensive manufacturer but, for example, something from MDT.

even though the questioner is still approaching the matter incorrectly there.

Why?

The expandability, the ease of making changes, and the flexibility are perhaps reasons enough, even if I might not want to do significantly more than with conventional automation now?

I have already had some reservations with such decisions as, for example, do I want to switch this roller shutter from here or from there? Do I want to switch the roller shutter in the bedroom from the door or from the left side of the bed or from the right side of the bed? Do I really want to switch everything individually? Maybe not, but I do not want to block those possibilities now. With KNX, I know that I can adjust that after 6 months and at any time. And that I can easily switch the roller shutter from all three places.

In addition to a solution that is basically modeled on the conventional principle, there are then gimmicks like scenes or waking up by dimming the light plus roller shutter or a central all-roller-shutters-down switch or an all-lights-off switch. Or an indicator if windows are open before I leave the house last.

And apparently, for example, I can initially install normal lamps without a dimming actuator and later retrofit a dimming actuator in the distribution board at any time and then just set dimming instead of switching on the touch sensor. Otherwise, I would probably have installed dimmers everywhere now in a frenzy of hopefully forgetting nothing.

And even if I don’t want to give up my motto, at least for now, that I want to switch everything myself and individually, such an MDT Glastaster II Smart with 12 functions is better than 12 individual switches. And when we have settled in a bit, maybe then only 8 functions and 4 scenes are stored there...

That’s why I would like to wire it now with KNX already and maybe start with a basic version, but pay attention to things that are difficult or impossible to retrofit. Like window contacts, for example.

Sorry, but completely rejecting it 4 days ago, now you already want to install it... it's like that with every topic of yours.

And this endless recapitulating... I never want to have such worries & fears.

You know what's nice about conventional wiring? It's there and basically nothing can be changed about it – guess how much lifetime you gain if you no longer think about configuration changes? Just calculate THAT.

You know what’s great about conventional wiring? It’s there and basically you can’t change it – guess how much lifetime you gain when you no longer have to think about configuration changes? Just calculate THAT

The argument can’t be denied either. I checked recently and when you start with KNX, sooner or later you install a weather station. And then you should install window contacts everywhere. And then presence detectors everywhere too. And I could solve my hallway light problem by installing even more technology like a multi-family house doorbell system and cameras as well as integrating the doorbell into the home automation. Eventually there will be visualization and a server. And then ̶y̶o̶u̶ want one of those voice controls. And then awesome, new, stylish pushbuttons come out and with KNX you can easily swap them out – so you buy and install new pushbuttons here and there. And then you have to pay for the upgrade to ETS6. And later maybe heating and ventilation get integrated too – so you inevitably end up with 20-30k in additional costs. Either immediately or over time... The second thing that also bothers me a bit are, truly, the pushbuttons. They look really sleek (at least the expensive ones – one can cost 500 EUR times 11 rooms => 5,500 EUR), but for the last 1-2 days I consciously operated our electrical installation and I noticed that you can operate a conventional light switch without looking, without stopping, just while walking by. For example, quickly going to the kitchen to get something from the fridge means that as soon as I step through the door I briefly reach out to the side without looking, continue to the fridge, and when leaving switch it off again while walking by. This blind operation is not possible with these pushbuttons. So if I don’t push it to the absolute point where everything works fully automated without pushbuttons (the 30k scenario), then I partially reintroduce the opposite of convenience. Go in, find the “button” for the light on the display, go to the fridge, and when leaving find again among the 6 closely spaced “buttons” the one that switches the light off again. So, difficult topic...

Better leave it...