Domoticz

At my home I have all my electric wires from all lamps, switches etc brought to one place in basement where those are connected to each other. I believe I can take advantage of that fact and make it be controlled by Domoticz. I also have a HP DL380e G8 Gen8 server with Ubuntu and Docker.

What I want to do is the light's to be operated by wall switch's (as it is now) + by Domoticz. What do I have to buy to do that?

I can imagine I should have some sort of USB bus where I can plug in electric wires and program that in Domoticz.

What I did till now is used few Sonoff Basic R2. It works ok but I need one such device per light each connect to wifi. Also it's completely not centralized.

Something like this? https://www.machinon.com/

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If you want to switch also in your basement switchboard you will need an extra wire to the light to be able to create an hotel switch. Else you cannot switch with the normal switch. The extra wire also needs to be attached to the normal switch so the switch needs to be compatible for that (normally they are).

Then you can put a 220V relay board in your basement to switch all your lights. There are some options here.
Eg https://sigma-shop.com/product/156/domo ... board.html
Or
http://denkovi.com/domoticz-with-denkovi-modules

Or replace your normal switch with a wireless signal device (Zwave or ZigBee) and have them send a signal to domoticz to switch the light. If Domoticz does not work, your lights cannot be switched.....

I guess you want:
1) Get state of wall switch
2) Turn light on/off giving state of wall switch and/or logic in Domoticz

If this is the case, you may use things that do both of these things, like (but not limited to) Shelly things (https://shelly.cloud/) or Sonoff (https://sonoff.tech/).

Depending on your needs, you may either use their cloud or have a local MQTT broker that could be connected to Domoticz. You may even download you own code (or IY available code like EspEasy/Tasmota/Espurna/...) to the ESP8265/6 inside these devices.

Note that having a centralized access is not mandatory, but may help having a good Wifi reception.