Next is a project example, where the Arduino is instructed to do something based on a correct key (secret number) being entered into the keypad, probably the most demanded application of the keypad.

A simple macro keypad with preset mixing. I came up with the idea after the first time I made a keypad with multiple modes, but I never managed to fill all of the 9 buttons with practical macros, and ...

If you google ringbuffer.h arduino there are results that may help. It is not code that is provided by Adafruit but part of the IDE. The Arduino forums would be another source of information.

[Andrea] just sent us this great student hack he made for his room. He’s constructed an Arduino keypad door lock — without using any proper fastening hardware! The entire build is made out of ...

Arduino enthusiasts or those looking to learn more about programming with Arduino and electronics-in-general may be interested in a new Kickstarter campaign and Arduino compatible 42-Digit SPI ...

Makers and developers that enjoy creating projects using the Arduino platform may be interested in a new shield for Arduino that incorporates an LCD JEMshield++, keypad and enclosure all in one ...

Arduino powered 5-key keypad includes a rotary encoder There was a time when people were happy to interact with their computer with a standard keyboard and mouse.