#include <Keypad.h>

const byte rowsCount = 4;

const byte columsCount = 4;

char keys[rowsCount][columsCount] = {

{ '1','2','3', 'A' },

{ '4','5','6', 'B' },

{ '7','8','9', 'C' },

{ '#','0','*', 'D' }

};

const byte rowPins[rowsCount] = { 9, 8, 7, 6 };

const byte columnPins[columsCount] = { 5, 4, 3, 2 };

Keypad keypad = Keypad(makeKeymap(keys), rowPins, columnPins, rowsCount, columsCount);

void setup() {

Serial.begin(9600);

}

void loop() {

char key = keypad.getKey();

if (key) {

Serial.println(key);

}

}

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