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ESP32 ADC input voltage range #228

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saeidimajid opened this issue Mar 21, 2023 · 0 comments
Open

ESP32 ADC input voltage range #228

saeidimajid opened this issue Mar 21, 2023 · 0 comments

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@saeidimajid
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In ESP32 ADC configuration we can attenuation input voltage to measure voltage higher than Vref. According to the table of the section "ADC Attenuation" higher measurable input voltage range with higher attenuation (ADC_ATTEN_DB_11) is 150 ... 2450mV.
Now the question is:
1- How can I measure input voltage highr than 2450mV till VCC ?
2- Why does the measured voltage not reach 0 ?
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