I also have the problem with 2x Sonos PLay1 can't play together “both” over WiFi.
I have 1 connected over WiFi wireless & 1 directly connected wired and it works fine.
But both over wirless = WiFi doesn’t work!
I seen them both in the ISP modem and they getting both an IP address!
I have made some month ago a call to Sonos but still can’t fix the problem because it is a multicast problem. I don’t think that this will the issue.
I have plugged 2 Sonos Play1 directly connected wired to the ISP modem behind. But still no luck!
Submit support diagnostic: 279263876
It makes me mad that I still not can connect 1 Sonos Play1 together and I have spended many times and effort to find a solution. I have checked the Internet as well, but no luck.
How to solve it?