First, export your group-addresses using ETS into a CSV-file, then feed it to this transformer which converts it into a simple JSON-like list:

{
  "name": "Central lights off",
  "id": "0/0/1"
}{
  "name": "Livingroom lights",
  "id": "1/1/0"
}{
  "name": "Basement South-Window sensors",
  "id": "1/1/1"
}
{ … }

This program requires Elixir / Erlang. Once installed, you can compile and run it via:

mix compile

mix run -e 'IO.inspect(KnxAddressImport.start())'

Don’t forget to also run mix deps.get once to install needed dependencies (CSV-/JSON-parser).