And this is the result on Lovelace dashboard.
Not calibrated
And calibrated
Somethingâs definitely wrong with your garden sensor. Can you paste the template editorâs result for that code, as you duplicated the toilet sensor instead?
Should be 18.8, not 30.63!
no its correct, the fist garden sensor probably wasnât⌠remember if these outside sensors are in the sun, they report a much higher temp than the actual feel temp, see this
Fair point: but something is wrong somewhere. Toilet and Tuin uncalibrated are showing the same in all screenshots.
right, missed that 
thought you where worried about the high temp, but you spotted they were identical . great catch!
Tuin uncalibrated has the wrong entity_id.
It is currently very warm in the back of the garden. So the temperature could be right. The official weather forecast indicates 27 degrees. The sensor hangs on the pergola in the sun
The temperature in the hall and toilet are much more in line now. I will have to check how accurate they are with a separate thermometer.
Youâre missing the point â your uncalibrated garden gauge was wrong:
Yeah, there was something wrong. I honestly donât know what the reason was.
Thank you for your patience and the will to help me. I still have a lot to learn, but your help has made it a lot more fun and motivated me to learn even more. THANK YOU and have a very HAPPY (SUNNY) WEEKEND! 
Greetz from The Netherlands
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