/*Write a program to interface keypad with Arduino board and display the key pressed on
Serial monitor*/
#include <Keypad.h>
byte ROWS=4;
byte COLS=3;
char keys[ROWS] [COLS]={
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'#','0','*'}
  };
byte rPins[ROWS]={8,7,6,5};
byte cPins[COLS]={4,3,2};
Keypad keypad=Kaypad(makeKeymap(keys),rPins,cPins,ROWS,COLS);

void setup(){
  Serial.begin(9600);
}

void loop(){
  char key=keypad.getKey();
  if(key!=NO_KEY)
  Serial.println(Key);

}