Floating point math is not 100% accurate on small MCU's, so try to convert you math to integers and see if it stabilizes. You could also use an average of the last 5-10 measurements in order to even out any electrical fluctuations.
Floating point math is not 100% accurate on small MCU's, so try to convert you math to integers and see if it stabilizes. You could also use an average of the last 5-10 measurements in order to even out any electrical fluctuations.