from machine import Pin, ADC, PWM
from utime import sleep, sleep_ms

sonido = PWM(Pin(16))

do = Pin(47, Pin.IN, Pin.PULL_UP)
re = Pin(48, Pin.IN, Pin.PULL_UP)
mi = Pin(45, Pin.IN, Pin.PULL_UP)
fa = Pin(39, Pin.IN, Pin.PULL_UP)

while True:

  print(do.value(),re.value(),mi.value(),fa.value())
  
  if do.value()==0:
    sonido.freq(277)
    sonido.duty(1023)
  
  elif re.value()==0:
        sonido.freq(293)
        sonido.duty(1023)

  elif mi.value()==0:
      sonido.freq(329)
      sonido.duty(1023)
    
  elif fa.value()==0:
      sonido.freq(349)
      sonido.duty(1023)
  
  else:
      sonido.freq(20)
      sonido.duty(0)