Is Smarthome KNX automation possible based on the floor plan?

The B&J Jalousiecontrol II UP insert also costs at least 80 EUR. For 19 roller shutters, that is 1,520 for the insert. Then there is an additional control element, for example with a timer, which costs 65 EUR. So if I want to equip all 19 roller shutters with at least a basic timer, that would be another 1,235 EUR. Altogether, that makes 2,755 EUR.

Heizung / Lüftung ist ein Thema für sich hier muss man anschauen, ob es überhaupt Sinn macht die Anlagen in den BUS einzubinden. Die Gateways sind oft unverhältnissmäsig teuer. Man kann es aber zur NOT auch später machen. Auch hier einfach BUS und ggf. NYM Kabel hinlegen.

Is it now only referring to the heating or also the RTRs?

Why the hell do you want to connect all 19 roller shutters to a timer switch? What's the benefit? Timer switches make sense where a) they are regularly raised and lowered and b) this happens at predictable times. Go through your roller shutters in your mind. How many of the 19 are still left?

Nice to see someone with enthusiasm I mean it. But you really change direction like other people change their underwear. And there's also something between 0 and 1.

By giving up timers, you save 46 EUR per control element. Either way, you end up somewhere between 2,300 and 2,800 EUR.

My view on automation hasn't necessarily changed. It should always be electric roller shutters and really follow the principle of a short press and it goes all the way down (not such continuous press buttons where you don’t save any time or such rocker switches that have to be reset again).

Of course, you would have to compare everything now, but with KNX it might not necessarily be that much more expensive.

So, I think I would like to cover the basic functions quite conventionally via push buttons/switches (and then, for example, install an RTR element with 5 rockers = 10 buttons in the living room for dimming 2 lamps and moving 3 roller shutters) and then parametrize that and maybe parametrize a few scenes, although that will certainly come later when you really know what the living habits will be like. Then the central off function (stove, oven, standby devices, lamps...). Maybe also some kind of window status display (possibly also via server -> smartphone?).

And more complex things then possibly via server, although the basic functions are always operable, even if the server fails.

Still the question now is, what else do you need for a complete KNX installation? Example presence detector: Only in passage areas? In passage and functional areas (HAR, utility room, possibly guest WC) or everywhere (expensive!)?

Or what do you have to think about regarding lights? LEDs were special because of transformers, voltage, etc., right?

Little tip: Search for KNX and forum and there you can read up and down. There you will find many things explained very simply and clearly, especially in the beginner section, including everything about LED lighting.

As I already wrote to you, mentally walk through the rooms once and write down which functions are needed. Not every room light has to be dimmable and not every socket has to be switchable.

So first of all, light, blinds, and room temperature control should run via KNX, so that everything is in one system. Heating and ventilation might not be that important? But they could definitely be retrofitted if heating, ventilation, and electrical installations are all located in the HAR on the ground floor.

Then I would want to install something like an RTR+temperature sensor+multi-button per room. The basic functions like light on/off/dim or blind up/down should already be switchable there. Since you will (or have to) have an RTR in rooms like the guest WC (including shower) or house connection room/technical room or utility room, why not put 4-6 buttons on it right away?

Basically, the most important thing is that it can be set later as desired apart from the basic functions. That might be a key advantage for me. After half a year, we realize that we always have this or that light on during meals, dimmed here, etc. – I don’t know all that yet. Then, at that point, it could be reprogrammed.

And then I think of functions like slowly dimming the light in the bedroom early in the morning and raising the blinds. That would probably have to run via server (so I can quickly set the wake-up time via phone in the evening). But for that, no additional sensors, buttons, or actuators are needed.

So my question is, which sensors, buttons, actuators, etc. are considered part of a "complete" KNX system by common opinion? I mean things like blind actuators for all blinds, dimming actuators for all dimmable light sources, switching actuators for all switchable light sources, for all switchable sockets, or presence detectors for hallways/stairs (or everywhere? But that gets expensive) or a temperature sensor per room plus heating actuator.

I don’t mean something like an occupancy sensor under the mattress, for example – that’s more of a niche thing. But blind actuators or dimming actuators will surely be installed by almost everyone who uses KNX, right?

And about lighting, I am even more confused than before. Do you use 230V and retrofit now or transformer centrally and then 24V to the lights? With certain combinations, can you also set light colors or is that just gimmicky? But that definitely doesn’t work with 230V and retrofit, right?

For me, there is a clear reason for KNX/central control, which (for me) cannot be beaten by anything:

Central OFF at the front door

By now, I know too many dramatic and sad stories of burned-down houses whose owners could absolutely do nothing about it, so I want to avoid that as much as possible.

I assume the two most important consumers to be switched off centrally would be the cooktop and the oven. But they also have a timer, right? Or are there special cooktops without a timer or where the timer sets itself?