Thanks for the feedback. I have several graphs in my XTension Webremote that are showing my temperatures as a seesaw between whole degrees. Accuracy is fine, the half degree C is more than close enough, I just want the graphs to be smoother.

@robertober This is probably due to a long time (> 1s) spent in setup() due to which the watchdog timer is resetting the chip. Check this page for more info: github-issue-WDT

@ndiwan you can check what kind of usb interface chip your nano clone uses: look at the bottom side of your nano, there should be only one chip. If it is a ch340 you will need the drivers given by Al.