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Re: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
Posted: Thu Oct 24, 2019 3:35 am
by rodmcm
Have a look at this on UTUBE
He provides a polynomial to linearise an analog
G6EJD
Tech Note 069 - Using the ESP32 ADC and some of its more advanced functions
Re: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
Posted: Mon Dec 09, 2019 1:48 am
by Bwanna
I could use help in the specific sketch to measure the VRef on my ESP32. I've seen where it says to use this or that command, but when I paste them into my Arduino sketch, they all fail.
Sorry for being inexperienced, but could really use the help.
Thanks,!!!
Re: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
Posted: Tue Dec 17, 2019 1:40 am
by Bwanna
Yes, I have working sketches for using temp sensors.... the issue is fixing the ESP32 ADC internal problems. While the correction of the non-linearity is one thing, I am disappointed that the ADC lacks consistency even with the corrections applied. Have decided to use an external ADC instead.
Re: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
Posted: Wed Mar 18, 2020 6:43 pm
by ramon82
Hi,
I am wondering if the workaround suggested by HelWeb is working ok for some more people.
I am not sure if this workaround is worthy since it is not feasible for production.
Regards, Ramon.