#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'},
  {'FF', '0', '#', 'D'}
};
byte rowPins[ROWS] = {13, 8, 7, 6};
byte colPins[COLS] = {5, 4, 3, 2};
Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
char user[6]; // assuming user input is 6 characters long
int index = 0;

void setup() {
  Serial.begin(9600);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop() {
  char customKey = customKeypad.getKey();

  if (customKey) {
    // Store the input from the keypad
    user[index] = customKey;
    index++;

    // Check if user input is complete (6 characters)
    if (index >= 6) {
      Serial.print("Input: ");
      for (int i = 0; i < 6; i++) {
        Serial.print(user[i]);
      }
      Serial.println(); // Print a newline after displaying the input

      // Concatenate and print the individual color components
      String red = String(user[0]) + String(user[1]);
      String green = String(user[2]) + String(user[3]);
      String blue = String(user[4]) + String(user[5]);

      Serial.print("Red: ");
      Serial.print(red);
      Serial.print(" Green: ");
      Serial.print(green);
      Serial.print(" Blue: ");
      Serial.println(blue);

      // Parse hexadecimal strings to long integers
      long redValue = strtol(red.c_str(), NULL, 16);
      long greenValue = strtol(green.c_str(), NULL, 16);
      long blueValue = strtol(blue.c_str(), NULL, 16);

      // Control RGB LEDs
      analogWrite(11, redValue);
      analogWrite(10, greenValue);
      analogWrite(9, blueValue);

      // Reset the index for the next input
      index = 0;
    }
  }
}