LG OLED42C34LA + Sonos Ray - anyone made these work together?

https://support.sonos.com/en-gb/article/unable-to-adjust-the-volume-using-the-lg-magic-remote

Thanks Ratty. Really appreciate your super-fast response.

On my LG OLED42C34LA if you go to Settings there’s no Device Connector option under Settings-General. There is an option for External Devices which I assume is the same thing under a different name. The options you then get are Connect Bluetooth Controller, HDMI Settings, Universal Control Settings, TV On With Mobile and Delete Connection History (ie no Connection Type option and no obvious way to get to a Component/AV choice). 

If I go to Universal Control Settings it gives me options to control the devices connected to the TV with the TV remote, but the Sonos Ray Soundbar isn’t listed there.

Back on the main Settings Menu under Sound-Sound Out there’s a Use Wired Speaker option, and one of the options under that is Optical Out Device. The TV says ‘Enjoy TV sound through audio devices conncted to the Optical Digital Audio Out. Ajust the volume of audio device with the remote control. If it does not work, check if the audio device supports the LG Sound Sync feature.’

When LG Sound Sync is on, the volume bar on the TV screen moves up and down but the volume doesn’t actually change. When it is off, I get the microphone icon with the bar across it if I press the volume button on the remote.

And I can’t find that SIMPLINK feature anywhere.

This is what I mean about the guidance on that page maybe being out of date or not appropriate for this model of TV?

Note too you don’t necessarily need Simplink, as that’s for enabling CEC on the TV, which is irrelevant for the optical port connection, although you may perhaps use the CEC protocol for other connected peripherals over HDMI.

Thanks Ken, that’s working now! You have saved Christmas!!!!

For reference, all you’re doing is getting the TV to configure the remote (via Bluetooth) to emit infra-red codes that the Sonos unit can then learn. To be honest, the remote could emit TV volume codes for anything (other than LG) and the Sonos should be able to recognise it.

Ah glad to hear you got it working. Merry Christmas.🎄

Unfortunately it stopped working shortly after my ‘Christmas is saved’ post. I have no idea why - I followed the instructions, got the TV to search for the Sonos soundbar, and it worked fine until the TV went to sleep. When I woke it up again we were back where we were - the volume symbol on the screen moves when the remote is operating but the sound coming out of the soundbar doesn’t actually change. 
Any point me trying to connect via HDMI instead?

I’ve set up the Magic Remote Control through the Sonos app and I’ve added the Sonos Ray soundbar  through Universal Control as the optical device output. The TV audio is coming out of the soundbar, the volume up/down bar and mute symbol appear on the TV screen when I press them on the remote control, but the soundbar volume doesn’t change.

I’m so embarrassed! The sensor on the front of the Ray was blocked. It wasn’t the TV going to sleep that made the remote stop working, it was someone pushing the Ray further back on the shelf without me noticing that was the problem. Thanks everyone for all your help!