**Lock Control** rev_11

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    - Project: **Lock Control**
    - Source Code NOT compiled for: Arduino Nano ESP32
    - Source Code created on: 2025-02-27 14:25:03

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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 <EasyButton.h> //https://github.com/evert-arias/EasyButton
#include <Deneyap_Servo.h>  //https://github.com/deneyapkart/deneyap-servo-arduino-library
#include <SoftwareSerial.h> // Software serial library
#include <Wire.h>          // I2C library
#include <Adafruit_DS3502.h> // Library for DS3502 digital potentiometer
#include <WiFi.h>          // WiFi library for ESP32
#include <WebServer.h>     // Web server library for ESP32

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void handleRoot(void);
void handleLockUnlock(void);
void updateOutputs();
void sendDataOverHC12();
void receiveDataOverHC12();
void readCurrentFeedback();
void checkButtonPress();
void toggleLockUnlock();

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t codeButton_PushButton_PIN_D9 = 9;

// HC12 connections
#define HC12_TX   6 // Changed to use pin 6 instead of D6 for compatibility
#define HC12_RX   4 // Changed to use pin 4 instead of D4 for compatibility

/***** DEFINITION OF PWM OUTPUT PINS *****/
const uint8_t servo_Servomotor_PWMSignal_PIN_D2 = 2;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
uint8_t servo_Servomotor_PWMSignal_PIN_D2_rawData = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
float servo_Servomotor_PWMSignal_PIN_D2_phyData = 0.0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
EspSoftwareSerial::UART HC12(HC12_TX, HC12_RX);
Adafruit_DS3502 ds3502 = Adafruit_DS3502(); // DS3502 instance

// Current feedback sensor pin
#define CURRENT_FEEDBACK_SENSOR_PIN A0  // A0 pin where the voltage is read
const int numSamples = 10;   // Number of samples to average
float runningSum = 0;        // Variable to store the running sum of readings
int sampleCount = 0;         // Counter to track the number of samples taken

#define HC12_DATA_REPETITION_TIME 1000

int current_setpoint = 0;
int current_feedback = -1;

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

// Web server on port 80
WebServer server(80);

// Lock state
bool isLocked = true; // Initial state is locked
const String correctPIN = "1234"; // Example PIN code

void setup(void)
{
    pinMode(codeButton_PushButton_PIN_D9, INPUT_PULLUP);
    pinMode(servo_Servomotor_PWMSignal_PIN_D2, OUTPUT);

    Serial.begin(9600);             // Serial port to computer
    HC12.begin(9600);               // Serial port to HC12
    ds3502.begin();

    // Initialize WiFi
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
        Serial.println("Connecting to WiFi...");
    }
    Serial.println("Connected to WiFi");

    // Define web server routes
    server.on("/", handleRoot);
    server.on("/lockunlock", handleLockUnlock);
    server.begin();
}

void loop(void)
{
    updateOutputs(); // Refresh output data
    receiveDataOverHC12();
    sendDataOverHC12();
    readCurrentFeedback();
    server.handleClient(); // Handle web server requests
    checkButtonPress(); // Check for button press
}

void updateOutputs()
{
    analogWrite(servo_Servomotor_PWMSignal_PIN_D2, servo_Servomotor_PWMSignal_PIN_D2_rawData);
}

void sendDataOverHC12() {
    static unsigned long lastTimeSendData = millis();

    if (millis() - lastTimeSendData > HC12_DATA_REPETITION_TIME) {
        HC12.println(String(current_feedback));
        lastTimeSendData = millis();
        Serial.println("sendData");
    }
}

void receiveDataOverHC12() {
    if (HC12.available()) {
        String receivedData = HC12.readStringUntil('\n');
        Serial.println(receivedData);
        int current_setpoint_temp = receivedData.toInt();

        if (current_setpoint_temp != current_setpoint) {
            current_setpoint = current_setpoint_temp;
            int digitalPotValue = map(current_setpoint, 0, 500, 0, 127);
            Serial.print("New current setpoint: ");
            Serial.println(current_setpoint);
            Serial.print("New Digital Pot value: ");
            Serial.println(digitalPotValue);
            ds3502.setWiper((uint8_t)digitalPotValue);
        }
    }
}

void readCurrentFeedback() {
    static float filteredValue = analogRead(CURRENT_FEEDBACK_SENSOR_PIN); // Initialize with the first reading
    int sensorValue = analogRead(CURRENT_FEEDBACK_SENSOR_PIN);
    filteredValue = (0.2 * sensorValue) + (0.8 * filteredValue);
    current_feedback = map((int)filteredValue, 0, 1023, 0, 500);
}

void checkButtonPress() {
    static EasyButton codeButton(codeButton_PushButton_PIN_D9);
    codeButton.begin();
    codeButton.onPressed([]() {
        toggleLockUnlock();
    });
    codeButton.read();
}

void toggleLockUnlock() {
    // Toggle lock state
    if (isLocked) {
        // Unlock the door
        Serial.println("Unlocking the door...");
        servo_Servomotor_PWMSignal_PIN_D2_rawData = 180; // Example value to unlock
        isLocked = false;
    } else {
        // Lock the door
        Serial.println("Locking the door...");
        servo_Servomotor_PWMSignal_PIN_D2_rawData = 0; // Example value to lock
        isLocked = true;
    }
}

void handleRoot() {
    String message = "Door is currently " + String(isLocked ? "Locked" : "Unlocked");
    server.send(200, "text/html", message);
}

void handleLockUnlock() {
    String pin = server.arg("pin");
    if (pin == correctPIN) {
        toggleLockUnlock();
        server.send(200, "text/html", "PIN accepted. Door state changed.");
    } else {
        server.send(403, "text/html", "Incorrect PIN.");
    }
}

/* END CODE */