APPLICATIONS NOTES

Buttons are among the simplest and fastest user input
method for microcontroller projects. To prevent the
signal from floating, you often need to connect external
pull-up or pull-down resistors when working with
GPIO’s without internal. You may also want to add an
LED to indicate the state of the button. In some
instances, this seemingly simple task may turn
troublesome especially for multiple buttons. This is why
we have this module. It is a ready-made push button for
general purpose user input.