We are planning our smart home in the single-family house

At the entry thread, I was initially impressed by the many thoughts the thread starter had put into it, the long list of wishes and ideas regarding implementation. I only had to laugh briefly at the budget and when I read GU ;-)

Overall, I have now read through the entire thread in one go and find many posts absolutely instructive. Even if some are not 100% on topic. I hadn’t had many ideas about usage in mind, and I read a lot of new things regarding implementation as well.

For example, I previously had a clear opinion about ERR (the “forum’s” opinion), which I thought was based on facts available to me. But the reasons in ’s post made me reconsider that and possibly revise my opinion. Actually, my bathroom gets too cold in winter :-(. I could probably retrofit ERR via 24V line or radio.

I would also like to bring in the keyword OpenHAB + ioBroker etc. Based on that, everything! can be brought under one roof.

P.S. Based on that, we (as a company) have “further developed” our own system. A load management system will also be integrated in the future. But that’s not my playground and I don’t always get all the info immediately ...

Prime example. Just because you have no idea how to do something like that, it doesn’t exist in your world. Horizon with radius 0 and that is then the point of view.

Well then please explain to me exactly how that works in practice? Please not just the theory that all data is somehow available somewhere, but how you then arrive at a functional solution which is practical.
In the commercial sector, I do see a lot of potential, but in a normal single-family house, not really. I just want to understand.
No creativity then presumably means that you first have to look for a problem for the existing solution (KNX / automation)?

Now you really made me laugh. You are also the first to explain to me that the thing is there to preheat a towel... I actually use it more for drying towels or preheating the bathroom more than the underfloor heating manages. But yes, where is the problem combining time, presence in the house, temperatures and occupancy? That's one-time work, then it just runs.

That was not my idea, I just took it up. If it is only about preheating the room, this affects only a few months of the year. It is more than sufficient to switch on the radiator on a timer when you normally get up in the morning. If you are not at home for a week in winter, you just turn it off. If you are away for just a few days, you just let it run. Surely costs only a fraction of the money and time compared to a complete automation and the comfort gain in the end is identical.

Well then please explain to me exactly how this works in practice? Please not just the theory that all data is available somewhere, but how you actually arrive at a working solution that is practical.

Although I wasn’t addressed, I’m happy to chime in here as a KNX fan :) I assume you want warm towels after showering and therefore turn on the radiator manually before stepping into the shower. How do you automate the whole thing now? The simplest way is a humidity sensor that quickly detects that humidity rises due to showering. In KNX, I link the humidity value as simple logic to the heating actuator: If “humidity higher than x%” then “set heating y to z degrees.” Internally, the heating actuator then receives the command from the logic module to turn up the bathroom heating whenever the humidity is high. To switch it off again, you build a second logic for a humidity value below a certain threshold. In KNX, you can either query the sensors cyclically or they only send actively when the state changes.

If you have ideas and understand the logic behind it a bit, you can create wonderful and practical automations ;)

Category: we are looking for a problem for a solution. :D

simple logic with the heating actuator: if "humidity higher than x%" then set y to z degrees". [...] If you have ideas and understand the logic behind it a bit, you can create really wonderful and practical automations ;)

Sounds simple, but have you ever tried it in practice? I’m just imagining how after a quick shower, the humidity rises above the value after 3 minutes – the heating turns on – and I jump out of the shower after 4-5 minutes because I’m in a bit of a hurry. Full of anticipation for a KNX-preheated towel, I’m disappointed to find that it’s still cold and the radiator is only just getting lukewarm. Full of energy, the humidity threshold is lowered – the heating should turn on earlier. Now every ventilation during tropically inspired spring nights also activates the heating – OH NO! Well, no problem, the whole thing is then coupled with a sensor for the humidity outside the building – wait no – then the radiator will no longer turn on either when it rains and the outdoor humidity is high. For me that would be too much, if you have a lot of fun with it and like to constantly tinker and optimize -> great. But you have to consider so many eventualities if you want to make it fully functional. For me as well as for most acquaintances currently building, a central option for shutter control as well as some light control and a few switchable sockets is important – but you probably don’t need KNX for that?

That was just an example from this post How to implement it technically is clear to me. My point was that a solution should also be practical and make at least some sense. I only shower for about 5 minutes in the morning on weekdays. That already makes it tight with the warm towel. If you want the room to be a bit warmer, you simply turn on the radiator at a specific time. So why KNX? Just a timer switch and done. That is often already integrated directly into the radiator.

In my understanding, automation using KNX only makes sense where interaction between devices is desired that normally have no connection. Like the example of the TV and the roller shutter. For everything else, the solutions from the respective manufacturers are better suited.
For a roller shutter, you can just as well install a wireless button directly next to the sofa and press it when needed. That should be easy to realize for well under 20k ;)