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Posted: Tue May 21, 2019 1:12 pm
by Adham Aboud
Hello All,

I'm trying to test the ADC peripheral of the ESP32 using the ADC example. I've connected Source voltage (3.3 to 2.9v) to GPIO34
My problem is that the ADC value is not changing when I change the voltage.
Capture.PNG (66.68 KiB) Viewed 990 times
Any Ideas ??

Thank you in advance

Re: ADC1

Posted: Tue May 21, 2019 1:34 pm
by ESP_Dazz
The 12-bit ADC has a maximum raw reading of 4095 meaning the ADC is maxed out. Change your ADC attenuation to support a larger voltage range.