Linearity of esp 32

harshcht
Posts: 5
Joined: Fri Mar 31, 2017 2:57 am

Linearity of esp 32

Postby harshcht » Thu Jun 08, 2017 5:43 am

I have read about the linearity issue on esp forums.
I recently did a test on it and found the following result (I am using the analog read function on the arduino IDE) :
[img]
2017-06-08.png
2017-06-08.png (60.76 KiB) Viewed 871 times
[/img].
the excel sheet attached has the input value and the output no. of the esp.

It is pretty linear above 1V however the below that it is quite non-linear.
Is there a way to solve this issue?

referring to :
viewtopic.php?t=1045#p4626

Has the look up table been included ? If not by when can we expect the issue to be solved?
adc linearity.xlsx
(13.42 KiB) Downloaded 69 times

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