Frustratedguy,
Just to add that when a sonos device is wired direct to a router, then all Sonos devices should switchover to their own internal SonosNet wireless signal/connection and removing the local WiFi credentials in the Sonos App is a good idea in that type of setup, as it stops the devices hopping between SonosNet and the routers WiFi signal.
It’s also best in that ‘wired’ situation to set the routers 2.4ghz WiFi channel and the SonosNet channel so they are at least 5 channels apart to prevent interference between the two signals.
When none of the sonos devices are wired, the SonosNet channel selector should disable, as its irrelevant as all products then connect directly back to the router using the routers 2.4ghz WiFi signal instead.
In this situation, I suggest setting the routers 2.4ghz band to use a channel width of 20MHz as that reduces interference aswell.
Many routers appear to like channel 6 by default, so I tend to opt for channels 1 or 11, but it’s really a case of what works best for the local environment. I find that ‘fixing’ a routers channels seems to work best with Sonos and reserving (fixing) each of the Sonos products IP address in the routers DHCP servers reservation table is a very good idea too.
This Sonos video about wireless interference is also quite a useful watch:
Wireless Interference and Sonos
If your Beam keeps dropping when on WiFi, despite perhaps trying the suggestions above, then when you have it wired back to your router and it reappears in the App I suggest you submit a Sonos system diagnostic report and contact/chat with the Sonos Support Staff via this LINK to see if there are any issues with the Beams WiFi network adapter.
