Internet Of Things / IoT / Connected Home / Smart Houses

Found it.

It was my work mobile, a Nokia 8. Ho hum.

Anyhow... I've now got the Amplifi set up thus:

• Wi-Fi is the roaming wifi network across the whole house and outside in the street too.
  
• Three zoned wifi networks (Front, Mid, Back) with split radio bands (2g,5g), i.e.: Wi-Fi Front 5g is the 5Ghz network at the front of the house... so this is 6 SSIDs in addition to the roaming one.
  
• All of the stereo devices and Google Home Hub, Google Mini, are connected to the closest 2g.
  
• All of the video devices are connected to the closest 5g.
  
• All phones and laptops are on the roaming network with automatic band selection.
  
  

This works really well now.

And because they're all on the same subnet (the wired and wireless all run from the Ubiquiti EdgeMax router DHCP and subnet so are all visible on the same network regardless of appearing as 8 different networks - wired, wireless, and the 6 zone and band specific wireless) everything can see everything else... the speaker groups work across multiple Wi-Fi networks and there's no congestion anywhere.

I'm happy :D