I’ve recently moved to Home Assistant and all of my devices (zwave, zigbee, hue mainly) have all migrated beautifully. So have the 3 Nest Protects that I currently have working through a Smartthings v2 hub using the old Nest API - as the Smartthings device handler that works with the Google API doesn’t support Nest Protects.
However, Smartthings are migrating from Groovy to Edge and I expect the device handler I have will soon break. I would therefore like to simplify things and integrate the Nest Protects directly with Home Assistant.
Reading into this thread, it would seem
a) that the preferred approach would have been to migrate to the Google API and use imick’s integration. But it has a (hopefully temporary) issue with Google’s authentication.
b) that the previous approach was to install the Homebridge plugin etc which also uses the Google API.
Does anyone know whether the Homebridge approach is affected by the Google authentication issue too? I’d be sad if I did the one way migration from the Nest to Google API and then got stuck again 
Or if I can somehow reuse the Nest API with a Home Assistant plugin? (I don’t think that is feasible)
Thanks