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	- Project: Strongbox
	- Source Code compiled for: Arduino Mega
	- Source Code created on: 2023-09-17 20:10:00
	- Source Code generated by: Tom

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/****** DEFINITION OF LIBRARIES *****/
#include 
#include 
#include 
#include 
#include 

/****** SYSTEM REQUIREMENT 1 *****/
// This is a project to create a strongbox with a keypad (to enter the code), a display (to show the state of strongbox) and a servo (to lock or unlock the door).

/****** SYSTEM REQUIREMENT 2 *****/
// A code number has to be stored in EEPROM (the value is 3478) and used for comparison with the code provided by user.

/****** SYSTEM REQUIREMENT 3 *****/
// At startup, Arduino has to initialize the display showing "Press digit code of 4 numbers:".

/****** SYSTEM REQUIREMENT 4 *****/
// Periodically the system has to wait the code of 4 numbers from keypad. After each number is introduced, add a '*' character on the second row. When the 4 digits are introduced, check if the code is equal to the value saved in EEPROM.

/****** SYSTEM REQUIREMENT 5 *****/
// Save on EEPROM also the state of machine which is composed of 2 states: "DOOR LOCKED" and "DOOR UNLOCKED".

/****** SYSTEM REQUIREMENT 6 *****/
// If the code is equal to EEPROM value and the state is "DOOR LOCKED", unlock the door: drive the servo to 180 degrees, show on display 'DOOR UNLOCKED' for 2 seconds, and change the state to 'DOOR UNLOCKED'.

/****** SYSTEM REQUIREMENT 7 *****/
// If the state is 'DOOR UNLOCKED', write on the display 'Enter 4 digits to lock the door', then wait for 4 digits on the keypad. And at each digit pressed, display a '*' character on the second row of the display.

/****** SYSTEM REQUIREMENT 8 *****/
// After the 4 digits are entered, change the state from 'DOOR UNLOCKED' to 'DOOR LOCKED', save it in EEPROM, drive the servo to 0 degrees, display 'DOOR LOCKED' for 3 seconds, and save the code in EEPROM.

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF PWM OUTPUT PINS *****/
const uint8_t servo_PIN_D2 = 2;

/***** DEFINITION OF I2C PINS *****/
const uint8_t display_LCD1602I2C_I2C_PIN_SDA_D20 = 20;
const uint8_t display_LCD1602I2C_I2C_PIN_SCL_D21 = 21;
const uint8_t display_LCD1602I2C_I2C_SLAVE_ADDRESS = 39;

// Function prototypes
static void initializeDisplay();
static void displayMessage(const char* message);
static void displayCodeEntry();
static void displayCodeConfirmation();
static void unlockDoor();
static void lockDoor();

void setup(void)
{
    // Initialize the servo pin as output
    pinMode(servo_PIN_D2, OUTPUT);

    // Initialize the display
    initializeDisplay();
}

void loop(void)
{
    // Main code logic goes here
}

// Function to initialize the display
static void initializeDisplay()
{
    // Code to initialize the display goes here
}

// Function to display a message on the LCD
static void displayMessage(const char* message)
{
    // Code to display the message on the LCD goes here
}

// Function to display the code entry prompt on the LCD
static void displayCodeEntry()
{
    // Code to display the code entry prompt on the LCD goes here
}

// Function to display the code confirmation prompt on the LCD
static void displayCodeConfirmation()
{
    // Code to display the code confirmation prompt on the LCD goes here
}

// Function to unlock the door
static void unlockDoor()
{
    // Code to unlock the door goes here
}

// Function to lock the door
static void lockDoor()
{
    // Code to lock the door goes here
}