Supported Raspberry
Raspberry PI 4 Model B

Raspberry PI 3 Model B+

Raspberry PI 3 Model B

Raspberry power supply
Micro USB for Raspberry PI 3 Model B and Raspberry PI 3 Model B+, USB type C for Raspberry PI 4 Model B
Micro SD card
At least 4 GB storage
Computer to write the SD
Reader/adaptor to write the SD
Internet connection through
Ethernet RJ45 cable
Gateway/Router KNX
All
Suggestions
Put the Raspberry device in a case to protect it.
The Raspberry pi3 version burns if you try to power it via PoE.