KeypadSim is an Arduino library for simulating a 4x3 matrix keypad. It allows you to queue keypresses programmatically, making it ideal for testing, automation, or simulating user input on devices ...

A touchscreen matrix using an 3.5" ILI9488 TFT with resistive touch and a Raspberry Pi Pico. The Raspberry Pi Pico has native HID Keyboard support. This sketch gives you 12 buttons in a 4x3 matrix.