Which smart home system to retrofit?

Hello

I want to retrofit a smart home
which smart home system would be best suited for this

the following points should be covered:
- if possible, everything should run through one app
- you should be able to create rules
- all solutions should allow replacing or continuing to use the existing switch (i.e. surface-mounted or flush-mounted)
- everything should still be manually operable without a phone, without internet, and so on.

- control electric roller shutters: for example, I want to set the roller shutters to always go down at sunset (i.e. it should constantly adjust automatically to the different times)
we have a lift-and-slide door: if it is open or ajar but not closed, the roller shutters at the door should not go down and lock me out :)

- control underfloor heating: all rooms have underfloor heating with individual room thermostats. I want to set the temperature once, e.g., living room 21 degrees and bedroom 18 degrees, and the underfloor heating should regulate everything else to maintain the temperature.

later on, the following should be added

light switches: I want to be able to control all light switches via the app (turn on and off) but they should also still be manually operable.

window contacts: to check if a window is still open or warn me if it is raining and it is open

I will later have a Hörmann sectional door installed and that should also be integrated (but it would not be a problem if it had to run separately)

I can only repeat myself... and add something. It’s way too late to start thinking about this now.

Since for you it won’t come to a "system" anyway, for many reasons. You need a higher-level instance which covers the greatest possible functionality and brings the island systems more or less under one roof.

In other words, you need e.g. Homeassistant or IP-Symcon or Savant or Nodered or or or...

As soon as you have chosen a favorite here, you can look for the "systems" which can then be integrated as simply and stably as possible.

It may then be that you use EnOcean window handles, Nest smoke detectors, Hue lamps, Hunter irrigation and thermostats from Tado.

So you have to put the cart before the horse. Not buy a bunch of electronics first and then try to make everything work together. But first choose and set up the platform and then buy components that are suitable.

Light switches: I want to be able to control all the light switches via the APP (turn on and off) but they should also continue to be manually operable.

Here it depends on how everything has been wired for you and since it was almost certainly done conventionally, it is basically an old building in terms of electricity now. So you need someone who knows about electricity and wiring to help you here. Of course, you can use "smart bulbs" everywhere (whatever that may be).

-control electric shutters: for example I want to set that the shutters always go down at sunset (so it constantly adjusts to the different times automatically)

That works with simple astro functions. But who knows what was installed at your place (cables, motors, sensors???). So this function is either very simple and cheap or very complicated and costly to realize.

we have a sliding door; when it is open or closed but not locked, the shutters at the door must not go down and lock me out

For that, you need a detection of the position of the door and the door handle.

Say goodbye to controlling the underfloor heating. It can do that much better on its own, and you don’t need any useless electronic junk.

I had already thought so. We can only retrofit since our builder does not offer smart home solutions.

Do you happen to know Homee? Would that be a suitable good central unit?

Why? Can't you just set the temperature there and the underfloor heating regulates the flow automatically?

@Musketier Why? Can't you just set the temperature there and the underfloor heating regulates the flow by itself?

You already have your ERR for that. Otherwise, an underfloor heating system is not "regulated". It is set, and that's it.

Otherwise, start with Shellys. You can install an iO Broker later and integrate even more things.

I wouldn't see it as fatalistic as . You can easily cover a large part of your requirements with Shellys. (smart switches, switchable sockets, app-controllable blinds).

I also find the statement implying that new buildings without a wired BUS system have to be labeled as old buildings too simplistic.

There are other ways to set up a modern smart home besides using a wired system (radio, Wi-Fi). The only question here is how much money and time one is willing to invest.