Hi,
I called Sonos support twice on this and let’s say they wasted my time…
I have 3 Sonos in my home (home wifi network) and 2 others in a Guest House (Access point connected directly with a underground network cable to the home router). I need my 2 Sonos in the Guest house to connect on the Acccess point and the 3 Sonos in the house to connect on the ‘’home wifi network’’. I seems that the Sonos App does not allow to connect different groups of product under different network. I suspect that, since both network are not so far from each others, they are picking up signal one from the other.
I even tried to creat a second Sonos Account to separate the 2 networks but the App recognize that the speakers are linked to the main account (maybe because of serial number). And yes I made sure to Factory reset all speakers before I start to configure.
Your ideas are more than welcome!