play 1 system

Have you seen this?  A factory reset is not needed.

https://support.sonos.com/en-us/article/connect-sonos-to-a-new-router-or-wi-fi-network

The easiest way to do it is to give your new wifi the same SSID and password as the one it replaces. Otherwise, try this: https://support.sonos.com/en-us/article/connect-sonos-to-a-new-router-or-wi-fi-network

ok - John types faster😜

I’m not sure about “faster” in this case.  Maybe “less”?  

I have in fact followed @nik9669a ‘s approach for my last two router changes and it has worked like a charm.  Not only does it avoid having to change anything in Sonos, there is no need to change the WiFi credentials in all your other connected devices.

I am not sure that it will work for every router in every circumstance, but it’s definitely worth being the first thing you try.

I also have Play 1 speakers and a Playbar and am having issues with connecting to wifi. When I go to System Settings on the app it shows my system, but when I go to Manage Networks, Update Networks it searches and shows products that I don’t own. It does this even when connected by Ethernet cable.  I asked this question in Sonos community, but didn’t get a response, and I’ve been in touch with Sonos and their answer is to reset. Anyone have an answer without resetting?

Were any of your speakers bought second hand?  If so, then you must reset them.  If you can avoid resetting the original speakers in your system then you need not lose settings anf playlists.

Please give more info on the “history” of your system.

John B, no my speakers are not second hand. Didn’t have any trouble connecting when they were new, but we’ve made a change to our network, and now having problems. I’m able to use them, but have to stay connected with cable. Don’t really want to reset and have to go back and load stations, etc. Besides, I’m curious why this other system is showing up when it searches for mine. They are Era 300, a Beam, and Era 100. Would it pick up a neighbors speakers with BLE, but not mine?

That is pretty weird.  The othr speakers might be discoverable peer-to-peer but I doubt that it is possible for them to join your system as they are on a different network.

I suggest you reset your controller app, but ensure that you opt to connect to existing system, not set up a new system.  Resetting the app loses no information as it is just a remote control for the system.  You will need to enter your Sonos account email address and password.

It is probably unnecessary, but I would consider changing my WiFi password, then allow Sonos to connect by following this guidance:

https://support.sonos.com/en-us/article/connect-sonos-to-a-new-router-or-wi-fi-network

You  can retain all of your system info such as stations etc by leaving just one speaker unreset.  But I don’t think there is any need to reset the speakers

By resetting the controller, you mean signing out or deleting the app or both? 

Have you tried logging on to Sonos.com ? It would be interesting to see what their backend thinks you have speaker wise. One you login, you should see a menu item for System which should show what Sonos thinks you have.