I’ve been using simple thermostat (HACS Front End) for months and it worked up to HA 7.4. When I installed HA 8.0 (and now 8.1), the overview was blank. Removing simple thermostat fixed the blank overview.
Note: I am running HA under Bullseye so it’s not officially supported, but I don’t think this problem is due to the version of Debian. If I have time, I’ll confirm that the problem exists on Debian 10.
Yes I did it’s working. Have you checked the actual thermostat entity? My honeywell every so often after an update needs to re authorized and simple therm will be blank.
A known problem. the honeywell integration on 2021.8.x only sees one thermostat. If you have two or more, they aren’t found and no climate.xxxx state is defined for them…leading to problems like I experienced.