keypad

Raspberry Pi with a keypad matrix

Today we will see how to interfacing the Raspberry Pi with a matrix keypad using Rpi-hw library. The library provides the class keypad::matrix↱, defined in “rpi-hw/keypad/matrix.hpp”↱, with which it is possible to manage keypads of any size. Its constructor method takes two ordered lists containing the GPIO pins used by the device: keypad::matrix( { COL0, …

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