#potentiometer
from machine import Pin, ADC
import utime

sensor = ADC(Pin(34))
sensor.atten(ADC.ATTN_11DB)
sensor.width(ADC.WIDTH_12BIT)
ledRed = Pin(21, Pin.OUT)

while True:
    measurement = float(sensor.read())
    conversion = round(measurement * 100 /4096, 2)
    print(conversion)
    utime.sleep_ms(900)

    if conversion > 20:
        ledRed.value(1)
    else:
        ledRed.value(0)