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Directionally correct is good enough. I've had the Aranet4 (which is fantastically accurate and calibrated) in the various spaces and it's confirmed the other temperatures are roughly correct (a couple show 1'c lower than what the Aranet4 has measured, but most are surprisingly accurate). Even for the ones that are slightly out, it doesn't matter... perfect accuracy isn't needed, just a roughly correct and consistent way of measuring over time.
Velocio
I'd have a check how accurate the temperatures from the motion sensors are. I have two and both are a couple of degrees off. I had to add an offset in home assistant to get them correct.