Lockbox for Escape Room

/*
   Marquessa MacKenzie
   December 6th, 2019
   Escape Room Lockbox
   Sources:
   LCD I2C Info: https://dronebotworkshop.com/lcd-displays-arduino/
   Keypad Door Lock: https://www.electronoobs.com/eng_arduino_tut11.php
*/


#include <Wire.h> // Including Libraries
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); //Configures the LCD so that the data can be read
#define I2C_ADDR 0x27 // Defining the LCD pins
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
#include <Servo.h> //Including More Libraries...
#include <Keypad.h>

//Variables
int mot_min = 90; // Setting The Minimum Servo Angle (Locked)
int mot_max = 180; //Setting The Maximum Servo Angle (Unlocked)
int character = 0; // Setting The Characters To Start Position
int activated = 0; // Activating The Starting Position
// Setting the initial print out and the string positions that will be useful for later:
char Str[16] = {' ', ' ', ' ', ' ', ' ', ' ', '-', '*', '*', '*', ' ', ' ', ' ', ' ', ' ', ' '};
//Pins
Servo myservo; // Naming Servo
int buzzer = 11;   //pin for the buzzer beep (this was not necessary but every time that I removed it there was something wrong with the code)
int external = 12; //pin to inside open (same as above)
int internal = 13; //pin to inside close (same as above)

//Keypad configuration
const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
//define the symbols on the buttons of the keypads
char keymap[ROWS][COLS] = {
  {'(', '&', '@', '*'}, // Changing the printout on the screen to not match what was on the key pad
  {'$', '^', '?', '!'},
  {'%', ')', '+', '#'},
  {'A', 'B', 'C', 'D'}
  //  {'1','4','7','*'}, // This was the original setting
  //  {'2','5','8','0'},
  //  {'3','6','9','#'},
  //  {'A','B','C','D'}
};
byte rowPins[ROWS] = {5, 4, 3, 2}; // Connecting to the row pinouts of the keypad
byte colPins[COLS] = {9, 8, 7, 6}; // Connecting to the column pinouts of the keypad

// Naming and initializing the keypad
Keypad customKeypad = Keypad( makeKeymap(keymap), rowPins, colPins, ROWS, COLS);

void setup() {
  Serial.begin(9600); // Running serial to see print out
  myservo.attach(10); // attach the servo to pin D10
  //  pinMode(buzzer,OUTPUT);
  //  pinMode(external,INPUT);
  //  pinMode(internal,INPUT);
  //Init the screen and print the first text
  lcd.begin(16, 2); //Starting position for LCD
  lcd.backlight(); // Turing on the backlight
  //  lcd.clear();
  lcd.setCursor(4, 0); // Setting the cursor to the correct spot to print out:
  lcd.print("PASSWORD");
  lcd.setCursor(0, 1); // Setting the cursor on the next line to print out:
  lcd.print("      -***     ");
  myservo.write(mot_min);  // Putting the servo in the closed position first

}

void loop() {
  char customKey = customKeypad.getKey(); // This function reads the pressed key

  if (customKey) {

    if (character == 0) // Setting 1 of 5 custom keys to print out what was entered on the keypad based off the string variable from earlier. If the character is equal to 0:
    {
      Serial.println(customKey); //Register the custom key
      Str[6] = customKey;  // on string position 6
      lcd.clear(); // clear screen
      lcd.setCursor(4, 0); // set the cursor at position 4 on LCD
      lcd.print("PASSWORD"); // LCD reads Password
      lcd.setCursor(0, 1); // Set the cursor to the 2nd line
      lcd.print(Str); // print the defined string variable

    }

    if (character == 1) // Progressing onto 2 of 5 with the same pattern as above.
    {
      Serial.println(customKey);
      Str[7] = customKey; // on string position 7
      lcd.clear();
      lcd.setCursor(4, 0);
      lcd.print("PASSWORD");
      lcd.setCursor(0, 1);
      lcd.print(Str);

    }

    if (character == 2) // Now to 3 of 5
    {
      Serial.println(customKey);
      Str[8] = customKey; // string position 8
      lcd.clear();
      lcd.setCursor(4, 0);
      lcd.print("PASSWORD");
      lcd.setCursor(0, 1);
      lcd.print(Str);

    }

    if (character == 3) // 4 of 5
    {
      Serial.println(customKey);
      Str[9] = customKey; // This is string position 9. This is the last one of the preprogrammed characters that will show up on the LDC
      lcd.clear();
      lcd.setCursor(4, 0);
      lcd.print("PASSWORD");
      lcd.setCursor(0, 1);
      lcd.print(Str);

    }

    if (character == 4) // 5 of 5
    {
      Serial.println(customKey);
      Str[10] = customKey; // This is the unlocking button. If you do not press then the box will not unlock.
      activated = 1; // When the 10th string position is activated then attempt to run the unlocking code

    }
    character = character + 1; // Once one character from the keypad is entered, move onto the next position on the LCD screen and register a new spot on the string
  }

  if (activated == 1) //If the unlocking key is activated at the 10th position on the string then run the possibility of opening the box.
  {
    if (Str[10] = 'A' && character == 5 && Str[6] == '$' && Str[7] == '!' && Str[8] == '@' && Str[9] == '%' ) //This is the code that will unlock the box. It is possible to change as needed
    {
      myservo.write(mot_max); // If the correct code is entered, rotate the servo to the maximum angle
      activated = 2; // If the unlocking code was right then run the accepted code:
      delay(500);  // delay 500 ms
      lcd.clear(); // clear the LCD
      lcd.setCursor(4, 0); // set the cursor
      lcd.print("ACCEPTED"); // LCD print accepted
      //      analogWrite(buzzer,240); // I did not use a buzzer but whenever I tried to remove this code the whole system would not work. So I am leaving it in for the sake of sanity
      //      delay(250);
      //      analogWrite(buzzer,200);
      //      delay(250);
      //      analogWrite(buzzer,180);
      //      delay(250);
      //      analogWrite(buzzer,250);
      //      delay(250);
      //      analogWrite(buzzer,LOW);
      //      delay(1000);

      lcd.clear(); // clear the LCD scree
      lcd.setCursor(2, 0); // set the cursor the position 2 on the top row
      lcd.print("YOUR PASSWORD"); // print out YOUR PASSWORD
      lcd.setCursor(3, 1); // Set cursor to position 3 on the 2nd row
      lcd.print("IS CORRECT"); // Print out IS CORRECT
      delay(1000); // delay 1 sec

      lcd.clear(); // clear the LCD screen
      lcd.setCursor(3, 0); // set cursor to position 3 on the top row
      lcd.print("PERMISSION"); // print out PERMISSION
      lcd.setCursor(3, 1); // set cursor to position 3 on the 2nd row
      lcd.print("IS GRANTED"); // print out IS GRANTED

    }
    else // If the password is not correct run this code:
    {
      lcd.clear(); // clear the LCD screen
      lcd.setCursor(2, 0); // set the cursor to position 2
      lcd.print("YOUR PASSWORD"); // print out YOUR PASSWORD
      lcd.setCursor(1, 1); // set the cursor to position 1 on the 2nd row
      lcd.print("IS NOT CORRECT"); // print out IS NOT CORRECT
      analogWrite(buzzer, 150); //If I commented out this portion of the code, the whole code would not work as well. So I have just left it in to run even tho there was no buzzer
      delay(3000);
      analogWrite(buzzer, LOW);
      character = 0; // Reset and rerun the beginning of the loop where the character = 0
      Str[6] = '-';
      Str[7] = '*';
      Str[8] = '*';
      Str[9] = '*';
      Str[10] = ' ';
      activated = 0; // Begin the loop over again
      lcd.clear();
      lcd.setCursor(4, 0);
      lcd.print("PASSWORD");
      lcd.setCursor(0, 1);
      lcd.print(Str);
    }
  }
  if (activated == 2) // alternatively if the password has been entered in correctly and the box is left unlocked:
  {
    if (customKey == 'B' ) // setting the custom key B to re-lock the box
    {
      myservo.write(mot_min); // If B is pressed then change the position of the servo to return to the most minimum position (aka: locked)
      activated = 0; //activate and run the main set up loop over again
      character = 0;
      Str[6] = '-';
      Str[7] = '*';
      Str[8] = '*';
      Str[9] = '*';
      Str[10] = ' ';
      lcd.clear();
      lcd.setCursor(4, 0);
      lcd.print("PASSWORD");
      lcd.setCursor(0, 1);
      lcd.print(Str);

    }
  }
}