cant connect using apps?

Power down all your S2 devices, and force kill the S2 app.

Now run the S1 app - it will only find your S1 Connect and will let you set it up.

Once done, power up the S2 devices and you will have a split system, ie use both apps, or use 3rd party apps that can handle split systems directly.

Check the C:A is older than 2015 from the start of the serial number on the device which will show the year and month of manufacture.

I would then remove/uninstall the S2 controller App from your mobile device and for good measure power off your S2 products. (The removal of the S2 App is the important step).

Install the S1 App and then try installing the C:A again (from factory reset, if required).

Hopefully that should work, but only if the C:A is S1 compatible only (older than 2015, generally speaking).

Then power back on the S2 devices and reinstall S2 App and connect it to the existing S2 system.

Ah I now see controlav has beat me to it. 👍

Thanks for that guys. I’ve done as you suggested, but now I’ve re installed S2, it now says “amp is incompatible” and my option to click on ‘system’ isn’t available. At the top of my iPhone screen though, it picked up my Sonos One but I’ll attach what it said next as an image;

Just ‘reset’ your S2 App (Settings/App Preferences) and give it another go.. I think you needed to give your S2 system time to settle after powering it back on. My guess is it will detect the S2 setup next time you launch the App and will invite you to press the ‘join’ button on one of the S2 devices.

Reset my S2 app and this is what I get;

I can’t find the amp on airplay, nor can I play anything using the s1 app. 
 

Do you perhaps have multiple WiFi access points in your Home network? I’m thinking there is an issue somewhere with your system (SSDP multicast) device discovery on your network. Anyhow, it seems the obvious next step is to get your S2 App to see your S2 system.

The way to go is to switch off the S1 device, then go onto try to get your S2 controller to see your S2 setup - if there are multiple WiFi access points try to get your mobile to switch to the other access point (if relevant here) by standing nearer to it and switching off/on the network connection on your mobile.

I think it’s because the connect amp is too old so un supported now?

All Sonos Connect Amps are still supported by the S1 App - but I thought you had it setup in the S1 controller App already and was now looking to reinstate your S2 App/devices?

It could be though, that if the C:A has not been updated for quite a while, then you ‘might’ need the help of Sonos support to get it onto the latest firmware (if it’s not been used for a long time), but perhaps try it wired to your router, as that can sometimes help with getting firmware updates?