/* 25/10/2021
 *  keypadv1
 *  basic control of a keypad
 * 
 * pins used
 * 2
 * 3
 * 4
 * 5
 * 6
 * 7
 * 8
 * 9
 */

 #include "Keypad.h"

const byte ROWS = 4; 
const byte COLS = 4; 
char keys[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[COLS] = {5, 4, 3, 2};
 
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
 
  

void setup(){
  Serial.begin(9600);
}
  
void loop(){
  char customKey = keypad.getKey();
  
  if (customKey){
    Serial.println(customKey);
  }
}