from machine import Pin

boton_pull_up = Pin(22, Pin.IN, Pin.PULL_UP)
led = Pin(2, Pin.OUT)
while True:

    if boton_pull_up.value()  == 0:
        print('LED encendido para pull-up')
        led.on()
    else:
        print('LED apagado para pull-up')
        led.off()