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The Keypad library for Arduino allows you to interface with a matrix keypad. This library is compatible with the Arduino IDE and provides an easy way to read key presses from a keypad.
Example
Here's a simple example of how to use the Keypad library:
#include <Keypad.h>// Define the rows and columns of the keypadconst byte ROWS = 4; // Four rowsconst byte COLS = 4; // Four columns// Define the keymapchar keys[ROWS][COLS] = {{'1','2','3','A'},{'4','5','6','B'},{'7','8','9','C'},{'*','0','#','D'}};// Connect keypad ROW0, ROW1, ROW2, ROW3 to these Arduino pinsbyte rowPins[ROWS] = {9, 8, 7, 6};// Connect keypad COL0, COL1, COL2, COL3 to these Arduino pinsbyte colPins[COLS] = {5, 4, 3, 2};// Create the Keypad objectKeypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);void setup() {Serial.begin(9600);}void loop() {char key = keypad.getKey();if (key) {Serial.println(key);}}Copied!✕CopyIn this example:
Keypad - Arduino Libraries
Feb 3, 2016 · Keypad is a library for using matrix style keypads with the Arduino.
- Software Version: 3.1.1
- Category: Device Control
Keypad | Arduino Documentation
Dec 25, 2017 · Browse through hundreds of tutorials, datasheets, guides and other technical documentation to get started with Arduino products.
Keypad.h - arduinoprojects - git clone https://git.tarina.org ...
It supports multiple keypresses while maintaining 11 || | backwards compatibility with the old single key library. 12 || | It also supports user selectable pins and definable keymaps. 13 || # 14 || 15 || @license …
Library: Keypad - Arduino IDE
Nov 19, 2015 · Keypad (Keypad.h) Keypad is a library for using matrix style keypads with the Arduino. As of version 3.0 it now supports mulitple keypresses.
Keypad/src/Keypad.h at master · Chris--A/Keypad · GitHub
A version of the keypad library found in Wiring. This is just a copy made compatible with the Arduino IDE library manager. - Keypad/src/Keypad.h at master · Chris- …
arduino/libraries/Keypad/Keypad.h at master - GitHub
My Arduino Projects. Contribute to jimmybyrum/arduino development by creating an account on GitHub.
Adding a Keypad library to a sketch - Arduino Forum
Nov 18, 2020 · How can I successfully download and add this library to this sketch? Do this: In the "Filter your search..." field, type "keypad" Press Enter. Click the "Install" button. Wait for the installation to …
DIYables_Keypad - Arduino Libraries
Apr 1, 2026 · The Arduino library for keypad. It works with any hardware platform such as Arduino, ESP32, ESP8266.
Keypad_Arduino/Keypad.h at master · ymollard/Keypad_Arduino
Forked and enriched Keypad library, based on the official version 3.1. Supports passwords, secret codes and any kind of sequence of keys. - Keypad_Arduino/Keypad.h at master · ymollard/Keypad_Arduino.
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