can't add sub to arc

Thank you, I’ll try it that way, when shall I add the Sub

I think I’d be quite frustrated by now as it’s not exactly cheap… 

Let’s try and break it down, one component at a time. When you get to this stage,  do you have a solid white LED on the Arc and flashing green on the two Era’s and Sub? 

Also, what is the exact make and model of your WiFi router? Is the Arc connected only via WiFi and not ethernet? 

Ha, Ha, it’s literally taken over my life, so obviously in pairing mode all the leds green, sorry really hard to put in a message, the arc isn’t showing any leds at all when operating, when I connect eras, they also don’t show any leds, the sub will not connect to the arc at all, only an era, that also shows no leds when connected to an era, the only thing I’ve ever seen a white led on is the sub, and that is when I’ve tried to operate it with the arc, but app says not connected, I have a Vodafone Ultra Hub, arc is connected by WiFi, not Ethernet as in different rooms, when I first went down this dark path, the Sonos tech support had me plug the arc into Ethernet and to be fair the sub then worked, all way too much for me, but I really appreciate your help, it’s literally taking over my life 

I can imagine. 

Does your Ultra Hub look like this? 

Yes it does, please tell me you know something 🤣🙏🏼

Under settings for WiFi on your router, does it have a WiFi Compatibility mode and is that on or off? 

It does have a WiFi compatibility mode, and yes it is on 

Ok, was hoping that would be off… 😀

If you change the box on the red bar at the top from basic to advanced, and then go to WiFi, what does it say for WiFi Mode, Bandwidth and channel on the 2.4 and 5 GHz boxes? 

Thanks, but where do I find the box on the red bar 

Sorry, it’s just above the red bar right hand side, should say basic mode. Switch to advanced.