microPython button irq long-press detection

button_long-press_test.py

import time

from micropython import const
from machine import Pin

BUTTON_A_PIN = const(17)


class Button:

    def __init__(self, pin, callback, trigger=Pin.IRQ_FALLING | Pin.IRQ_RISING, min_ago=500):
        self.callback = callback
        self.min_ago = min_ago

        self._blocked = False
        self._next_call = time.ticks_ms() + self.min_ago

        pin.irq(trigger=trigger, handler=self.debounce_handler)

    def call_callback(self, pin):
        self.callback(pin)

    def debounce_handler(self, pin):
        if time.ticks_ms() > self._next_call:
            self._next_call = time.ticks_ms() + self.min_ago
            self.call_callback(pin)


def button_a_callback(pin):
    if pin.value() == 0:
        print("Button A (%s) LONG PRESSED" % pin)


button_a = Button(pin=Pin(BUTTON_A_PIN, mode=Pin.IN), callback=button_a_callback)

Unfortunately, the debouncing according to the script above did not work in my application.
So I'm using the "Switch debouncing" instead, as described here.