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
ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
Re: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
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,!!!
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?
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?
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.
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.
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