TTP229 Capacitive 4x4 Keypad Module has two sets of jumpers which you have to connet to select the specific mode for the module. For this example script we selected a jumper JP2, which is for the 16 ...

This project implements a Password Generator on an Arduino using a 4x4 Keypad Module as the user interface. Users can define parameters like the length of the password and character types (letters, ...