from machine import Pin
from time import sleep_ms, ticks_ms

button_pressed = True
def cb(pin):
    global button_pressed
    stamp = 0.5
    pressed_time = ticks_ms() - stamp
    if pressed_time >= 199.5:
        button_pressed = False
        stamp = pressed_time

def main():
    sleep_ms(20)
    global button_pressed, stamp
    button = Pin(1, Pin.IN, Pin.PULL_UP)

    button.irq(trigger=Pin.IRQ_FALLING, handler=cb)


    if button_pressed == False:
        if button.value() == 0:
            print("Hello ESP-32")
            sleep_ms(200)
            button.value(1)
        button_pressed = True


if __name__ == "__main__":
    while True:
        main()