Thanks for input. Those suggestions seems useful. However currently for my part there is no pressing need to get access to more precise temperature data. I made this quick attempt mostly to get an idea about my own system's general temperture behaviour before and after the next project - removing the fan, for passive cooling. Haven't begun that procedure yet, got to get a special case for cooling first. Last time I tried this the main problem was to get the system out from the pretty tightly built NUC case without causing too much damage. Actually I lost the microphone and the WiFi + Bluetooth last time. Still it was worth it because the result was a totally silent PC.

For the future it could be cool to include cpu temperature feedback in some game. Alas that will not happen, at least not in near time.