import utime
from machine import Pin
from machine import ADC
from machine import PWM

potenziometro= ADC (27)
led_verde=Pin(0, Pin.OUT)
led_giallo=Pin(1, Pin.OUT)
led_rosso=Pin(2, Pin.OUT)

conversion_factor=3.3/65535

while True:
    value=potenziometro.read_u16()
    voltage=value*conversion_factor
    if voltage >= 3.0:
        led_verde.value(1)
        led_giallo.value(1)
        led_rosso.value(1)
        else if 2.0 < voltage < 3.0 :
            led_verde.value(0)
            led_giallo.value(1)
            led_rosso.value(1)
            else if 1.0 < voltage < 2.0 :
                led_verde.value(0)
                led_giallo.value(0)
                led_rosso.value(1)
                else if 0.0 < voltage < 1.0 :
                    led_verde.value(0)
                    led_giallo.value(0)
                    led_rosso.value(0)