Door contact cable laid into the technical room

I will manage that.
Do you get the data through the network interface (if the interface is open, is there a specification for it), or through another interface (RS485, etc.)? I assume the connection between indoor and outdoor stations will not be a "simple" UDP or something like that. So pure reading should (only) be possible via a switch with a monitor port.
Or how am I supposed to imagine it?

Thanks, regards

It is an addon. Search for "Github Hikvision pergolafabio". It connects directly to all stations via IP and then connects it to Homeassistant via MQTT. As I said: you need the interest, time, and knowledge for that. But you are really flexible.

The protocol is openly defined but apparently has pitfalls. The addon handles all that very well. If you are really hardcore, you can of course write something like that yourself.

As an example:
It rings, the indoor stations show the image. You press the "Open" button on the indoor station. This "event" then goes to Homeassistant, which sends the command to the Nuki motor.

I also have a door sensor. When it rings and you are just at the door and open it, the call is automatically declined via Homeassistant. So you don’t have to go to a door station and reject it there first.

First of all, sorry for hijacking your thread. I'll stay out of it for now and might get back to you if I find a solution.

As I said, I have the problem that my version with camera, NFC etc. is only available in the POE version from Metzler.

Is that so? Then I have one more problem. For the version from I unfortunately lack the mentioned affinity for technology (or rather the desire to deal so intensively with my doorbell...).

First classic question. Is your network cable from the outdoor station to the technical room in the conduit?

If I understand the datasheet of the Metzler outdoor station correctly, it only has Fast Ethernet anyway. If you do POE with phantom power, you only need 4 wires for that anyway. Then you have 4 wires free in the network cable on the way back to the technical room.

Just spoke with Metzler on the phone. According to them, there is no solution for my set up. They are even taking back the system (although it was purchased over half a year ago - I think that's great!).