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	- Project: **Servo Control**
	- Source Code compiled for: Arduino Nano ESP32
	- Source Code created on: 2024-10-07 22:00:22

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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 *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include  // Use the XYZrobotServo library instead of the standard Servo library
#include  // Keypad library
#include  // WiFi library for web server

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs();
void handleClient();
char getKey(); // Added function prototype for getKey()

/***** 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','#'},
};

// Define the correct PIN code
const String correctPin = "1234"; // Example PIN code
String inputPin = ""; // To store user input

// Servo object
XYZrobotServo myServo(Serial, 1); // Instantiate with Serial and ID 1

// 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

void setup(void)
{
    // Initialize servo
    myServo.setPosition(0, 0); // Start with the door locked

    // Initialize keypad pins
    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);

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

void loop(void)
{
    updateOutputs(); // Refresh output data
    handleClient(); // Handle incoming client requests

    // Check if a key is pressed
    char key = getKey();
    if (key) {
        if (key == '#') { // If '#' is pressed, check the PIN
            if (inputPin == correctPin) {
                uint16_t position = myServo.readPosition();
                if (position == 0) {
                    myServo.setPosition(90, 0); // Unlock the door
                } else {
                    myServo.setPosition(0, 0); // Lock the door
                }
            }
            inputPin = ""; // Reset input
        } else {
            inputPin += key; // Add key to input
        }
    }
}

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);
}

void handleClient() {
    WiFiClient client = server.available(); // Listen for incoming clients
    if (client) {
        String currentState = (myServo.readPosition() == 0) ? "Locked" : "Unlocked";
        client.println("HTTP/1.1 200 OK");
        client.println("Content-type:text/html");
        client.println();
        client.println("");
        client.println("
Door is " + currentState + "
");
        client.println("");
        client.stop(); // Close the connection
    }
}

char getKey() {
    // Implement keypad reading logic here
    // This function should return the pressed key character
    Keypad keypad = Keypad(makeKeymap(Keys_Keypad3x4), 
                           new byte[KEYPAD3X4_ROWS]{keypad_Keypad3x4_R1_PIN_D4, keypad_Keypad3x4_R2_PIN_D5, keypad_Keypad3x4_R3_PIN_D6, keypad_Keypad3x4_R4_PIN_D7}, 
                           new byte[KEYPAD3X4_COLS]{keypad_Keypad3x4_C1_PIN_D8, keypad_Keypad3x4_C2_PIN_D9, keypad_Keypad3x4_C3_PIN_D10}, 
                           KEYPAD3X4_ROWS, KEYPAD3X4_COLS);
    char key = keypad.getKey();
    return key; // Return the pressed key character
}

/* END CODE */