#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}; //r1, r2, r3 , r4
byte colPins[COLS] = {9, 8, 7, 6}; //c1 , c2 , c3 , c4

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  Serial.begin(9600);
  pinMode(11, OUTPUT);
}
  
void loop(){
  char key = keypad.getKey();
  
  if (key){
    Serial.println(key);

    if(key == '1'){
      tone(11, 1000);
    }
    else{
      noTone(11);
    }

     if(key == '2'){
      tone(11, 5000);
    }
     else{
      noTone(11);
    }
     if(key == '3'){
      tone(11, 7000);
    }
     else{
      noTone(11);
    }
    






  }
}