import time
time.sleep(0.1) # Wait for USB to become ready

from machine import ADC,Pin
pot=ADC(Pin(26))
led=Pin(0,Pin.OUT)
while 1:
    val=pot.read_u16()
    volt=val/65535.0*3.3
    print("adc value is",val,volt,"V")
    if volt<1.0 or volt >2.0:
        led.value(1)
        print("led is on")
    else:
        led.value(0)
        print("led is off")
    time.sleep(0.4)