I think I read somehere that the ADC accuracy is poor when the radio is
enabled.
Can you do plots with and without the radio?

Cheers,
John La Rooy

On Tue, Oct 20, 2015 at 1:17 PM, Justin Richards <justin.richards@gmail.com=
>
wrote:

> Should have mentioned that the JPG plots the error over the range of
> samples.
>
> On 20 October 2015 at 10:15, Justin Richards <justin.richards@gmail.com>
> wrote:
>
> > I decided to measure and plot the error of the ESP8266 internal ADC.
> >
> > Thought I would share the results.
> >
> > PSU HP E3631A and Fluke 87 to set the voltage between 0 and 1.020 Volts=
..
> >
> >  V Actual,V ADC
> > 0.01,0.001
> > 0.02,0.008
> > 0.03,0.017
> > 0.04,0.028
> > 0.05,0.038
> > 0.06,0.05
> > 0.07,0.06
> > 0.08,0.07
> > 0.09,0.08
> > 0.1,0.09
> > 0.11,0.102
> > 0.12,0.113
> > 0.13,0.124
> > 0.14,0.136
> > 0.15,0.149
> > 0.16,0.158
> > 0.17,0.168
> > 0.18,0.18
> > 0.19,0.189
> > 0.2,0.2
> > 0.21,0.209
> > 0.22,0.221
> > 0.23,0.232
> > 0.24,0.242
> > 0.25,0.253
> > 0.26,0.266
> > 0.27,0.275
> > 0.28,0.285
> > 0.29,0.297
> > 0.3,0.306
> > 0.31,0.316
> > 0.32,0.326
> > 0.33,0.338
> > 0.34,0.35
> > 0.35,0.356
> > 0.36,0.367
> > 0.37,0.38
> > 0.38,0.394
> > 0.39,0.404
> > 0.4,0.412
> > 0.41,0.425
> > 0.42,0.438
> > 0.43,0.447
> > 0.44,0.458
> > 0.45,0.466
> > 0.46,0.477
> > 0.47,0.488
> > 0.48,0.496
> > 0.49,0.508
> > 0.5,0.518
> > 0.51,0.53
> > 0.52,0.54
> > 0.53,0.552
> > 0.54,0.562
> > 0.55,0.573
> > 0.56,0.582
> > 0.57,0.593
> > 0.58,0.603
> > 0.59,0.613
> > 0.6,0.625
> > 0.61,0.635
> > 0.62,0.649
> > 0.63,0.66
> > 0.64,0.669
> > 0.65,0.678
> > 0.66,0.693
> > 0.67,0.701
> > 0.68,0.711
> > 0.69,0.722
> > 0.7,0.731
> > 0.71,0.744
> > 0.72,0.753
> > 0.73,0.763
> > 0.74,0.776
> > 0.75,0.785
> > 0.76,0.795
> > 0.77,0.81
> > 0.78,0.816
> > 0.79,0.829
> > 0.8,0.835
> > 0.81,0.847
> > 0.82,0.857
> > 0.83,0.868
> > 0.84,0.878
> > 0.85,0.891
> > 0.86,0.901
> > 0.87,0.914
> > 0.88,0.925
> > 0.89,0.936
> > 0.9,0.945
> > 0.91,0.957
> > 0.92,0.965
> > 0.93,0.977
> > 0.94,0.986
> > 0.95,0.998
> > 0.96,1.006
> > 0.97,1.018
> > 0.98,1.024
> > 0.99,1.024
> > 1,1.024
> > 1.01,1.024
> > 1.02,1.024
> >
> >
> --
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