ADC

• ADC1_CH0 = GPIO36
• ADC1_CH1
• ADC1_CH2
• ADC1_CH3 = GPIO39
• ADC1_CH6 = GPIO34
• ADC1_CH7 = GPIO35
• ADC1_CH4 = GPIO32
• ADC1_CH5 = GPIO33

• ADC2_CH0 = GPIO0
• ADC2_CH1
• ADC2_CH2 = GPIO2
• ADC2_CH3 = GPIO15
• ADC2_CH4 = GPIO13
• ADC2_CH5 = GPIO12
• ADC2_CH6 = GPIO14
• ADC2_CH7 = GPIO27
• ADC2_CH8 = GPIO25
• ADC2_CH9 = GPIO26

Parameters for full ESP32 chip. For others, refer to documentation.

• ADC_ATTEN_DB_0 100mV ~ 950mV
• ADC_ATTEN_DB_2_5 100mV ~ 1250mV - range extended by about 2.5 dB (1.33 x)
• ADC_ATTEN_DB_6 150mV ~ 1750mV - range extended by about 6 dB (2 x)
• ADC_ATTEN_DB_11 150mV ~ 2450mV - range extended by about 11 dB (3.55 x)