#include <Keypad.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_LEDBackpack.h>


// Define pin configuration for keypad
#define ROWS 4
#define COLS 4
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {2, 3, 4, 5};  // Adjust these pins based on your configuration
byte colPins[COLS] = {6, 7, 8, 9};  // Adjust these pins based on your configuration

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

// Define pin configuration for seven segment display
Adafruit_7segment sevseg = Adafruit_7segment();

void setup() {
  Serial.begin(9600);
  sevseg.begin(0x70);  // I2C address 0x70
}

void loop() {
  char key = keypad.getKey();
  if (key) {
    Serial.println("Key Pressed: " + String(key));
  
    // Display key on seven-segment display
    if ((key >= '0' && key <= '9') || (key >= 'A' && key <= 'D')) 
  }
}