Control of multiple roller shutters

The data he’s providing is ridiculous. And for a few blinds then installing KNX. To me, that’s totally off-topic and pure money burning.

A colleague retrofitted WLAN-based stuff for the blinds in his apartment. It works individually, but not with group function. There are 8 blinds; when he wanted to raise them all centrally, it rarely worked with all of them; usually 1-2 blinds didn’t execute the command. He tore it out again and replaced it with something on 868, I’d have to ask again.

Well.... if I run my WiFi over 300 sqm from one router without a repeater, that's a clear case. But I don't think anyone would do that. Mesh is a simple and good solution. So I currently operate 14 blinds over WiFi on 3 floors and have never had any problems. You of course have to ensure comprehensive WiFi coverage, that's a clear thing. But especially the 2.4 GHz is extremely powerful and stable. It looks different on 5 GHz. You have to set up a few more repeaters there. But basically, I don't see a problem for the average end user.

Optimal of course to operate everything on 5 GHz. Hardly anyone does that and the range is lower. Which of course increases the use of repeaters and requires basic compatibility of the devices.

With somewhat better routers, you can also create multiple networks to separate data-intensive things like streaming from home automation.
Whereas in new buildings or old buildings, streaming, cameras, etc. naturally run via cable.

Repeaters and mesh have no place in new buildings either. But here, philosophies apparently collide.

(...) Why one should rely on radio in new construction is just as incomprehensible to me. Assuming you want an automated house and not a playhouse.

Because of costs and/or the developer? Unfortunately, not everyone plans their house themselves.

Why one should rely on radio in a new build is just as incomprehensible to me. Provided that you want an automated house and not a playhouse.

Presumably, with your evaluative remark, you mean the presence of a central bus system to which all sorts of things can be connected. I am also in favor of cables. But radio was more sensible in our new build, which was supposed to have as little technology as possible. At the window manufacturer I ordered radio motors, done. For less money, I got the certainty that the control can be designed to be reasonably flexible (groups, sensors if required, wind guards, etc.). During the construction phase, I did not want to deal with the more expensive and potentially less flexible central wiring, a central control only for shading, as well as the associated electrician.