from machine import Pin
from time import *

print('hello ESP32!')

D1 = 3
D8 = 8
led = Pin(D1, Pin.OUT)
btn = Pin(D8, Pin.IN, Pin.PULL_UP)

while True:
  print('btn =', btn.value())
  if btn.value():
    led.off()
  else:
    led.on()
  sleep_ms(100)