Room temperature not good with radio temperature sensor

Hello, i have tried the project that look great but I have 1 issue, 
I use a radio temperature sensor and the temperature is not good one the open firenet page and the ha sensor integration.
I have 25,6°C and the webpage gives 0,9

<img width="675" height="982" alt="Image" src="https://github.com/user-attachments/assets/4d07d9ef-0aa8-4df5-82bd-50cc8a943fae" />

Thanks for help
