Sonos |ntegration for older S1 players

The Sonos integration doesn’t seem to work for the older generation S1 systems ( or at least I am not getting it to work).
Is this correct assumption?

Hi,
my Play:1 is also not found. It is only connect with a network cable. No WiFi and the old communication between the old Sonos which are using their own WiFi protocoll.

Ralf