My Google Nest Doorbell (Battery) went offline this morning. It is connected to a power supply and was showing over 60% power when last connected. I have tried a restart and the light goes white and then about 30 seconds later goes green with the ring indicator light on around the button. But it still shows "Offline". Rebooted router and all other devices (including many google home devices) re-connect ok.
Tried to factory reset and held in the button on the back for over a minute and the light goes white, then off, then white, then off! No other colours or tones occur. And, yes, I've tried it with power, without power etc.
I do really like the device, but how do I reset it! [or is it broken and I need to get a replacement?]
And... If I do have to send it back under warranty, where is the Serial Number as someone tossed the box it came in.
