analog_read.py

# analog read

from machine import ADC, Pin
from time import sleep_ms

adc = ADC(Pin(34))
adc.atten(ADC.ATTN_11DB)

while True:
    print(adc.read())
    sleep_ms(20)

Hookup Pattern

1. Connect Pot1 to ESP32 GND
2. Connect Pot2 to ESP32 34
3. Connect Pot3 to ESP32 3V