Arduino - Dual Function Button - Long Press/Short Press (Without Delay) + Bonus : 6 Steps - Instructables
Programio-ide-arduino-open-header-file-V2 - PROGRAMINO IDE Software for Arduino
Add Double and Triple Press Functionality to Your Arduino Buttons! - YouTube
Switch library
What maximum number of buttons i can connect to Arduino (100 buttons and more) - Electrical Engineering Stack Exchange
Problem with certain button and 'double-click' function - General Electronics - Arduino Forum
GitHub - LennartHennigs/Button2: Arduino/ESP button library that provides callback functions to track single, double, triple and long clicks. It also takes care of debouncing.