Now on Core 2023.3.0 and Matter 4.0.0. Integration says use companion app. Companion still does not have Add Matter Device. Glad I won’t depend on this for quite some time.
But, cleared cache of companion app and updated to 4.1.0 Matter add-on. Now "Add Matter Device’ is available.
BUT, BUT when I click it I’m told “Matter is currently unavailable”. I’ll say! The add-on is running and claims to be listening.
Config entry ‘Matter’ for matter integration not ready yet: Failed to connect to matter server; Retrying in background. Good luck!
Deleted Google Home from Android phone, then reisntalled it from Play Store. Now can add matter device. Successfully flashed Lighting App for [ESP32-C3-DevKitM-1]. BUT, after entering manual code and waiting for “Connecting device to Home Assistant …” got “Can’t find device.”
Have progressed to “Not a Matter-certified device” for ESP32-C3 running example Matter app. Added entries in Google Home Console per instructions, but no change (“Not a Matter-certified device”).