geh mal bitte unter Entwickleroptionen und Zustände. Such mal "
sensor.bbq_thermo" und "sensor.wlanthermo_channel_1_all" wenn da schlüssige daten sind, ist es dass nicht.

aus github readme:
https://github.com/MStapelfeldt/wlanthermo
### 3. Additional Plugins for Dashboard
To use the provided dashboard layout (see `bbq.yaml`), install these custom components via HACS:
- [lovelace-badge-card](https://github.com/thomasloven/lovelace-badge-card)
- [lovelace-layout-card](https://github.com/thomasloven/lovelace-layout-card)
- [config-template-card](https://github.com/iantrich/config-template-card)
- [button-card](https://github.com/custom-cards/button-card)
- [kiosk-mode](https://github.com/maykar/kiosk-mode)
- [vertical-stack-in-card](https://github.com/ofekashery/vertical-stack-in-card)
- [apexcharts-card](https://github.com/RomRider/apexcharts-card)
Refer to the documentation in each repository for installation instructions. For editing files, the easiest way is to use the "File editor" add-on from the Home Assistant Add-on Store. Create files with the same names, add the content, and save.