Zwave - Devolo Scene Switch MT:2652?

Has anyone managed to include a Devolo Scene Switch (MT:2562) properly in openhab?

In 2.4, I can get it to include… But it shows as an unknown device. And nothing comes through when any buttons are pushed. And it never becomes known (Even if I leave it for a week… or a month… or longer)

I see a couple of threads, over the years, but nothing really conclusive jumps out and smacks me in the forehead.