**Lock System** rev_88

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    - Project: **Lock System**
    - Source Code NOT compiled for: Arduino Nano ESP32
    - Source Code created on: 2024-10-06 10:19:20

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* The servo motor installed in the door will lock or */
    /* unlock based on the correct PIN code received by */
    /* the button. If the door is unlocked and the PIN is */
    /* correct, it will lock. If the door is locked and */
    /* the PIN is correct, it will unlock. */
/****** SYSTEM REQUIREMENT 2 *****/
    /* The webserver provides a web page about lock or */
    /* unlock state of the door. */
/****** END SYSTEM REQUIREMENTS *****/


/********* User code review feedback **********
#### Feedback 1 ####
- use keypad to get pin.
********* User code review feedback **********/

/****** DEFINITION OF LIBRARIES *****/
#include <Deneyap_Servo.h>  //https://github.com/deneyapkart/deneyap-servo-arduino-library
#include <Keypad.h> //https://github.com/Chris--A/Keypad
#include <EasyButton.h> //https://github.com/evert-arias/EasyButton
#include <LcdKeypad.h>  //https://github.com/dniklaus/arduino-display-lcdkeypad
#include <XYZrobotServo.h>  //https://github.com/pololu/xyzrobot-servo-arduino
#include <WiFi.h> // Include WiFi library for web server

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs();
void handleClient(); // Function to handle web client requests
bool checkForCorrectPIN(); // Function to check for correct PIN
void toggleDoorLock(); // Function to toggle the door lock state

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t keypad_Keypad3x4_R1_PIN_D4        = 4;
const uint8_t keypad_Keypad3x4_R2_PIN_D5        = 5;
const uint8_t keypad_Keypad3x4_R3_PIN_D6        = 6;
const uint8_t keypad_Keypad3x4_R4_PIN_D7        = 7;
const uint8_t pinButton_PushButton_PIN_D2       = 2;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t keypad_Keypad3x4_C1_PIN_D8        = 8;
const uint8_t keypad_Keypad3x4_C2_PIN_D9        = 9;
const uint8_t keypad_Keypad3x4_C3_PIN_D10       = 10;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
bool    keypad_Keypad3x4_C1_PIN_D8_rawData      = 0;
bool    keypad_Keypad3x4_C2_PIN_D9_rawData      = 0;
bool    keypad_Keypad3x4_C3_PIN_D10_rawData     = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
float   keypad_Keypad3x4_C1_PIN_D8_phyData      = 0.0;
float   keypad_Keypad3x4_C2_PIN_D9_phyData      = 0.0;
float   keypad_Keypad3x4_C3_PIN_D10_phyData     = 0.0;

const uint8_t KEYPAD3X4_ROWS = 4; //four rows
const uint8_t KEYPAD3X4_COLS = 3; //three columns
char Keys_Keypad3x4[KEYPAD3X4_ROWS][KEYPAD3X4_COLS] = {
    {'1','2','3'},
    {'4','5','6'},
    {'7','8','9'},
    {'*','0','#'},
};

// Create Servo object
Servo servoMotor; // Updated from Deneyap_Servo to Servo

// Create Keypad object
Keypad keypad(makeKeymap(Keys_Keypad3x4), keypad_Keypad3x4_R1_PIN_D4, keypad_Keypad3x4_C1_PIN_D8, KEYPAD3X4_ROWS, KEYPAD3X4_COLS);

// WiFi credentials
const char* ssid = "your_SSID"; // Replace with your WiFi SSID
const char* password = "your_PASSWORD"; // Replace with your WiFi Password

WiFiServer server(80); // Create a server that listens on port 80
bool doorLocked = true; // Initial state of the door

void setup(void)
{
    // put your setup code here, to run once:

    pinMode(keypad_Keypad3x4_R1_PIN_D4, INPUT_PULLUP);
    pinMode(keypad_Keypad3x4_R2_PIN_D5, INPUT_PULLUP);
    pinMode(keypad_Keypad3x4_R3_PIN_D6, INPUT_PULLUP);
    pinMode(keypad_Keypad3x4_R4_PIN_D7, INPUT_PULLUP);
    pinMode(pinButton_PushButton_PIN_D2,    INPUT_PULLUP);

    pinMode(keypad_Keypad3x4_C1_PIN_D8,  OUTPUT);
    pinMode(keypad_Keypad3x4_C2_PIN_D9,  OUTPUT);
    pinMode(keypad_Keypad3x4_C3_PIN_D10,     OUTPUT);

    // Initialize the servo motor
    servoMotor.attach(3); // Attach the servo to pin 3

    // Start WiFi
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
    }
    server.begin(); // Start the server
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    updateOutputs(); // Refresh output data
    handleClient(); // Handle incoming web client requests
}

void updateOutputs()
{
    digitalWrite(keypad_Keypad3x4_C1_PIN_D8, keypad_Keypad3x4_C1_PIN_D8_rawData);
    digitalWrite(keypad_Keypad3x4_C2_PIN_D9, keypad_Keypad3x4_C2_PIN_D9_rawData);
    digitalWrite(keypad_Keypad3x4_C3_PIN_D10, keypad_Keypad3x4_C3_PIN_D10_rawData);

    // Check for correct PIN input
    if (checkForCorrectPIN()) {
        toggleDoorLock(); // Toggle the door lock state
    }
}

bool checkForCorrectPIN() {
    const char* correctPIN = "1234"; // Example correct PIN
    String enteredPIN = ""; // Variable to store entered PIN
    char key;

    // Read from keypad and store in enteredPIN
    while (enteredPIN.length() < 4) { // Assuming a 4-digit PIN
        key = keypad.getKey();
        if (key) {
            if (key == '*') {
                enteredPIN = ""; // Reset if '*' is pressed
            } else if (key == '#') {
                break; // End input on '#'
            } else {
                enteredPIN += key; // Append key to enteredPIN
            }
        }
    }

    return (enteredPIN.equals(correctPIN)); // Check if entered PIN matches
}

void toggleDoorLock() {
    doorLocked = !doorLocked; // Toggle the lock state
    if (doorLocked) {
        servoMotor.write(0); // Lock the door
    } else {
        servoMotor.write(90); // Unlock the door
    }
}

void handleClient() {
    WiFiClient client = server.available(); // Check if a client has connected
    if (client) {
        String currentLine = ""; // Make a String to hold incoming data
        while (client.connected()) {
            if (client.available()) {
                char c = client.read(); // Read a byte
                if (c == '\n') {
                    // If the current line is blank, you got two newline characters in a row.
                    if (currentLine.length() == 0) {
                        // Send HTTP headers
                        client.println("HTTP/1.1 200 OK");
                        client.println("Content-type:text/html");
                        client.println();
                        // Send the HTML page
                        client.println("<!DOCTYPE HTML>");
                        client.println("<html>");
                        client.println("<h1>Door Lock State</h1>");
                        client.println(doorLocked ? "<p>The door is locked.</p>" : "<p>The door is unlocked.</p>");
                        client.println("</html>");
                        client.println();
                        break;
                    } else {
                        currentLine = ""; // Clear the current line
                    }
                } else if (c != '\r') {
                    currentLine += c; // Add to the current line
                }
            }
        }
        client.stop(); // Close the connection
    }
}

/* END CODE */