Linearity of esp 32

[harshcht]

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 (60.76 KiB) Viewed 4292 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

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