In this tutorial, you will learn how to interface keypad 4×4 with Arduino. Don’t worry its easy, just follow the steps below.

Before getting started, watch this video first to understand about working and interfacing keypad with arduino.

Arduino Keypad Tutorial

4×4 Keypad Pinout and Connections

Keypad Library for Arduino

Download Keypad Library for Arduino

Keypad Arduino Code

Download Keypad Arduino Code

Note : You need to install the above attached keypad library for Arduino.

#include <Keypad.h> const byte ROWS = 4; //four rows const byte COLS = 4; //three columns char keys[ROWS][COLS] = { {'1','2','3','A'}, {'4','5','6','B' }, {'7','8','9','C'}, {'*','0','#','D'} }; byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad byte colPins[COLS] = {9, 8, 7, 6}; //connect to the column pinouts of the keypad Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS ); void setup(){ Serial.begin(9600); } void loop(){ char key = keypad.getKey(); if (key != NO_KEY){ Serial.println(key); } }