Sonos has reduced access over the years, in particular to the comprehensive internal diagnostics which used to be a cornucopia of information, on the grounds of ‘security’ and ‘supportability’.

As for your specific Playbar issue, at boot time the unit should connect to the best signal of the 2.4GHz SSIDs configured into the system. There’s no way via the app to steer it to this BSSID or that.

Depending on your WiFi system you may however be able to engineer a binding from that side. ASUS meshes for instance can do so.

We haven’t been able to get this to work properly -- if I want to use the PlayBar Gen 1 in my config, I will have to hardware it.   But it also may be an issue with the Netgear Orbi.  I have this below.   The Sonos support rep mentioned there may be issues with these.  I think there are multiple issues here and the iOS app is buggy --- again, if Sonos would provide advanced tools for people to utilize (who know how to) it would go a LONG WAY at helping advanced folk debug and configure their devices.     The tools the Support rep has allows them to just mass-join speakers to an SSID, where we mere mortals have to do it manually, the hard way which really sucks.  LOL

Just for clarification: there's only one generation of Playbar, so "Gen 1” does anly ad confusion.

Out of curiosity: you state “the iOS app is buggy” - since the app is only a remote to the system - why do you describe it as “buggy"? Do you perhaps expect too much from the app?

What hard way? If I want to add a new SSID to the system I just direct the controller to a nearby device and enter it. It’s automatically propagated to all the other devices.