long_press_example.py

import time
import board
from digitalio import DigitalInOut, Direction, Pull

LONG_PRESS_DURATION = 0.65  # seconds

btn_select = DigitalInOut(board.BUTTON_SELECT)
btn_select.direction = Direction.INPUT
btn_select.pull = Pull.DOWN

btn_pressed_time = -1
prev_btn_select_val = False
prev_btn_select_longpress_val = False
while True:
    # current time
    now = time.monotonic()
    
    # current btn value
    cur_btn_select_val = btn_select.value
    
    # button was just pressed
    if not prev_btn_select_val and cur_btn_select_val:
        btn_pressed_time = now
        
    # Button was released
    if not cur_btn_select_val and prev_btn_select_val:
        if not prev_btn_select_longpress_val:
            print("Button was short pressed / released!")

    # button is currently pressed
    if cur_btn_select_val:
        if now - btn_pressed_time >= LONG_PRESS_DURATION:
            if not prev_btn_select_longpress_val:
                print("Button is longpressed!")
                prev_btn_select_longpress_val = True
    else:
        prev_btn_select_longpress_val = False
        
    prev_btn_select_val = cur_btn_select_val