**Servo Control** rev_101

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    - Project: **Servo Control**
    - Source Code NOT compiled for: Arduino Nano ESP32
    - Source Code created on: 2024-10-06 17:43:34

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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 *****/

/****** 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 <WiFi.h> // Include WiFi library for web server

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs();
void handleKeypadInput(char key);
void startWebServer();
void handleClient();

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

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
Servo doorServo; // Create a Servo object for the door
Keypad keypad = Keypad(makeKeymap(Keys_Keypad3x4), keypad_Keypad3x4_R1_PIN_D4, keypad_Keypad3x4_R2_PIN_D5, keypad_Keypad3x4_R3_PIN_D6, keypad_Keypad3x4_R4_PIN_D7, KEYPAD3X4_ROWS, KEYPAD3X4_COLS);

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

WiFiServer server(80); // Create a server that listens on port 80

bool doorLocked = true; // Initial state of the door
const String correctPIN = "1234"; // Define the correct PIN code
String enteredPIN = ""; // Store the entered PIN

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(keypad_Keypad3x4_C1_PIN_D8, OUTPUT);
    pinMode(keypad_Keypad3x4_C2_PIN_D9, OUTPUT);
    pinMode(keypad_Keypad3x4_C3_PIN_D10, OUTPUT);

    doorServo.attach(3); // Attach the servo on pin 3

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

void loop(void)
{
    // put your main code here, to run repeatedly:
    char key = keypad.getKey();
    if (key) {
        handleKeypadInput(key);
    }
    handleClient(); // Handle incoming client requests
    updateOutputs(); // Refresh output data
}

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 handleKeypadInput(char key)
{
    if (key == '#') { // If '#' is pressed, check the entered PIN
        if (enteredPIN == correctPIN) {
            doorLocked = !doorLocked; // Toggle the lock state
            doorServo.write(doorLocked ? 0 : 90); // Move servo to lock/unlock position
        }
        enteredPIN = ""; // Clear entered PIN
    } else if (key == '*') { // Clear the entered PIN
        enteredPIN = "";
    } else {
        enteredPIN += key; // Append the key to the entered PIN
    }
}

void startWebServer() {
    server.begin(); // Start the server
}

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
                currentLine += c; // Add it to the end of the currentLine
                if (c == '\n') { // If the line is complete
                    client.println("HTTP/1.1 200 OK"); // Send response
                    client.println("Content-type:text/html");
                    client.println();
                    client.println("<html><body>");
                    client.println("<h1>Door is " + String(doorLocked ? "Locked" : "Unlocked") + "</h1>");
                    client.println("</body></html>");
                    client.println();
                    break;
                }
            }
        }
        client.stop(); // Close the connection
    }
}

/* END CODE */