from machine import Pin, time_pulse_us
from time import sleep, sleep_ms, sleep_us

def DHT11(gpio=0):
  bits=bytearray(40)
  Bytes=bytearray(5)
  pin=Pin(gpio)
  pin.init(Pin.OUT, Pin.PULL_DOWN)
  pin.value(0)
  sleep_ms(18)
  pin.value(1)
  sleep_us(30)
  pin.init(Pin.IN, Pin.PULL_UP)
  sleep_us(90) #80-100
  for i in range(40):
    bits[i]=time_pulse_us(pin,1)
  bitcnt=7
  ix=0
  for i in range(40):
    if bits[i] > 40: Bytes[ix] |= (1<<bitcnt)
    bitcnt-=1
    if bitcnt<0:
      bitcnt=7
      ix+=1
  sum=0
  for b in Bytes[0:4]: sum+=b
  return Bytes[2], Bytes[0], sum & 0xFF == Bytes[4]

if __name__=="__main__":
  for i in range(3):
    x=DHT11()
    T,H,OK=x
    print(T,H,OK,"Temp {:2d}ºC Humedad {:2d} %".format(T,H))
    sleep(0.2)