from machine import Pin, ADC
import utime


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

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

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