I thought you asked this
The 1st search result, the phoscon site explains it all. That’s why I got the impression you can’t or didn’t search 
What you ask now
is something else, and here’s a pointer:
The Deconz app is still in the community store.
If you haven’t, first install the community store app:
If that succeded, install the Deconz app:
That happened very recently and you couldn’t know.
It’s very not user friendly of Athom to just display a 404 error instead of a little explanation imho…
Some background buzz:
