I wish I had taken notes at this point so I could say exactly what happened. But essentially, my system started to disappear (at least from the perspective of my Android phone controller). The Amp wasn't working, and my other speakers had disappeared from my setup. Eventually I got the Amp set up by connecting it via ethernet cable, but no other Sonos devices/rooms appeared in the app.
After being unable to re-add the old speakers, I decided to start over. I factory reset all of the speakers and chose 'reset controller' in the Sonos app on my phone. After a few attempts, it seems like I am pretty consistently able to setup one speaker, but adding the second—sub, surround, or otherwise—inevitably fails. (I get to the green flashing light, press the button(s), it flashes orange and eventually times out, saying it can't connect.)
A few possibly relevant details:
- I had a Pi-hole running on the network acting as a DNS and DHCP server. This was added after the initial Sonos setup. I have disabled the device and moved DHCP functions back to the router, but to no avail.
- I have changed the router since the initial setup, but that was about 4 months ago, and I had no issues until attempting to add the Amp yesterday
- The router is an ASUS AC5300 operating in "tri-band smart connect" mode, where each device is directed to the best band for its location and abilities. There are two 5GHz bands and one 2.4GHz band.
Thank you everyone for any help you can provide.
Best answer by ratty
If there are still problems then Sonos could be reacting badly to the router's band steering. In that case for initial setup temporarily wire the one speaker which has been set up satisfactorily to the network. The other units should then add correctly using SonosNet.