If I have my phone connected to my Tenda mesh I get the "no Sonos on this network" message.
If i fire up and old 2.4g AP and connect to that then suddenly the app can see the system. My router can see the sonos on the system but the app cannot. My system is wired to a Play 3 and I have 2 Play 5's connected by sonosnet. I've given up trying to get my bridge to work that hasn't worked for a year or 2 no matter what I try.
Best answer by ratty
Alternatively, wire the Sonos to a LAN port on the first Tenda unit, not to your existing router.