from utime import sleep
sleep(0.1) # Wait for USB to become ready

from machine import ADC, Pin
pot = ADC(Pin(26))  # create ADC object on ADC pin
led=Pin(0,Pin.OUT)
while 1:
    value=pot.read_u16() #read from pot
    volt=value/65535.0*3.3
    print("adc value is",value)
    print("adc value is",volt,"volt")
    if volt<1.0 or volt >2.0:
        led.value(0)
    else:
        led.value(1)
    sleep(0.5)