Hi @Old Oly 

Welcome to the Sonos Community! And, apologies for the delay!

Yes, it is possible. I think the following steps should fix things for you, but please be aware that if you reset all products on your S1 system, any playlists or favourites will be deleted, and services will be removed:

1. Turn off (unplug) all S2 devices
2. Reset the S1 Sonos app: Settings » App Preferences » Reset App » Reset
3. Reset your S1 devices: Factory reset your Sonos product. They should flash green lights.
4. Open the Sonos S1 app, opt to set up a new system, sign in with your existing account, and add products to the system.
5. Once S1 devices have all been set up, you should be able to now turn on your S2 system and use the systems/apps independently.
6. It is now important that the S1 app only ever communicate with the S1 system - should the S1 app open and happen not to connect to your S1 system, it will instead find the S2 system and suggest that you upgrade. You don’t want to do this - instead, look for why the S1 app might not be able to connect to S1 devices on your system.

Please pay particular attention to point 6 - it’s possible that you don’t need to do any of the preceding steps if the issue is simply that the S1 app cannot find the S1 system.

I have a suspicion, however, that this is what you have already been guided to do - if this is the case, I can only recommend that you call in when the S1 app reports that you need to use the S2 app. It’s likely that in this case you just need to troubleshoot why the S1 app cannot find the S1 system. Looking at your system now, I can see that the device on S1 is not connected to our cloud, so my recommendation is first to ensure that it is powered-on, and if it connects via ethernet, that the cable is still connected at both ends.

I’ll leave the steps above for others who may be asking similar questions - I no longer think you personally should follow them.

I hope this helps.

sonophone app £4 can control both S1 and S2 devices, might be worth a try...