btn_led_interrupt_handler_debounce.py

from micropython import const
from machine import Pin
from utime import ticks_ms


LED_GPIO_PIN = const(23)
BUTTON_GPIO_PIN = const(22)


def interrupt_handler(pin) -> None:
    """
    debounce, count and toggle led high/low
    :param pin: class pin
    :return: None
    """
    global count
    global led
    global last_time

    new_time = ticks_ms()

    if (new_time - last_time) > 200:
        count += 1
        last_time = new_time
        print(f'[INFO] LED switch {count} by {pin}')
        led.value(not led.value())


if __name__ == '__main__':
    last_time = 0
    count = 0

    led = Pin(LED_GPIO_PIN, Pin.OUT, value=0)
    btn = Pin(BUTTON_GPIO_PIN, Pin.IN, Pin.PULL_UP)

    btn.irq(trigger=Pin.IRQ_FALLING, handler=interrupt_handler)