ADC1

Adham Aboud
Posts: 46
Joined: Mon Apr 30, 2018 5:32 pm

ADC1

Postby Adham Aboud » Tue May 21, 2019 1:12 pm

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.
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Any Ideas ??

Thank you in advance

ESP_Dazz
Posts: 147
Joined: Fri Jun 02, 2017 6:50 am

Re: ADC1

Postby ESP_Dazz » Tue May 21, 2019 1:34 pm

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.

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