#include <Keypad.h>
const byte Rows=4;
const byte Cols=4;
char hexaKeys[Rows][Cols]={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowpins[Rows]={9,8,7,6};
byte colpins[Rows]={5,4,3,2};
Keypad customkeypad=Keypad(makeKeymap(hexaKeys),rowpins,colpins,Rows,Cols);
char customkey;
int led=10;

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
  
}

void loop() {
 customkey=customkeypad.getKey();
 if(customkey!=NO_KEY)
 {
  Serial.println(customkey);
  switch(customkey){
    case'1':
    digitalWrite(led, HIGH);
    break;
    case'2':
    digitalWrite(led, LOW);
    break;
    default:;


  }



 }
 
}