Hi, I don't know if I did something different than most describe here.
After the tip from @Robertvl I gave rights to access my HA instance and
it worked. I never removed the thermostats from my configuration. Maybe
thats my luck?
I filled in the external url on which my HA is accessable in
my.home-assistant, changes the redirect URI in the Cloud Console and now
eveything is working as before. Thermostats in HA are working and in
Node-Red also. Thanks!
I'm not sure the problem is with Google. I'm getting a Error 400:
redirect_uri_mismatch. In the details it says that the request is to
https://my.home-assistant.io/redirect/oauth. I'm sure I used
"https:///auth/external/callback" for the Authorized r...