#define BLYNK_TEMPLATE_ID "TMPL2bclPtm8i"
#define BLYNK_TEMPLATE_NAME "final project"
#define BLYNK_AUTH_TOKEN "2aQUgpLY_Io7nSsAwvg6SMvTLuWBNfs9"


#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>
#include <DHTesp.h>
#include <BlynkSimpleEsp32.h>
#define DHTPIN 16
DHTesp dht;
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
Servo motor1;
Servo motor2;

int pos = 0;
const int trigpin = 18;
const int echopin = 19;
const int ldrpin = 34; // LDR on pin 36

LiquidCrystal_I2C lcd(0x27, 20, 4);  // Adjust the I2C address if needed

int led1 = 5;  // LED 1 connected to pin 5
int led2 = 27; // LED 2 connected to pin 27

double distancecm;
double duration;
double distanceinch;

BlynkTimer timer;


void setup() {
  Serial.begin(115200);
  dht.setup(DHTPIN, DHTesp::DHT22); 
  Blynk.begin(auth, ssid, pass);
  //timer.setInterval(2000L, sendDHTData);
  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  pinMode(led1, OUTPUT);  // Define LED 1 pin as output
  pinMode(led2, OUTPUT);  // Define LED 2 pin as output
  pinMode(ldrpin, INPUT);
   analogReadResolution(10);
  motor1.attach(12);  // Attach servo to pin 12
  motor2.attach(14);  // Attach servo to pin 14
  motor1.write(90);  // Start motor1 at opposite direction (180 degrees)
  motor2.write(90);    // Start motor2 at opposite direction (0 degrees)
 
  lcd.init();  // Initialize LCD with default settings (20x4)
  lcd.clear(); // Clear the LCD at startup
  lcd.setBacklight(1); // Turn on backlight
  lcd.setCursor(0, 0);
  lcd.print("Complete");
  lcd.setCursor(0, 1);
  lcd.print("Automation ");
  delay(1000);  // Wait for the startup message to show
  lcd.clear();
  
  // Start Serial communication
  Serial.begin(9600);  // Initialize serial communication at 9600 baud rate
}
BLYNK_WRITE(V3) {
  int buttonState = param.asInt();
  if (buttonState == 1) {
    motoropen();
    Blynk.virtualWrite(V0, 1);
    delay(2000);
    Blynk.virtualWrite(V0, 0);
     motorclose();  
    Blynk.virtualWrite(V3, 0);
    
  } else {
     motorclose();  
  }
}

//void sendDHTData() {
  //float t = dht.getTemperature();
 // float h = dht.getHumidity();
  
 // if (isnan(h) || isnan(t)) {
 //   Serial.println("Failed to read from DHT sensor!");
  //  return;
 // }

 // Blynk.virtualWrite(V2, t);
  //Blynk.virtualWrite(V4, h);

  /*Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print("%\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" °C");*/
//}
void loop() {
  // Measure distance using ultrasonic sensor
  Blynk.run();
  timer.run();
  int ldrValue = analogRead(ldrpin);
  int brightness = map(ldrValue, 0, 1023, 0, 1023);
 // timer.setInterval(500L, sendDHTData);
 float t = dht.getTemperature();
  float h = dht.getHumidity();
   Blynk.virtualWrite(V2, t);
  Blynk.virtualWrite(V4, h);
  digitalWrite(trigpin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigpin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigpin, LOW);
  duration = pulseIn(echopin, HIGH);
  distancecm = (duration * 0.034) / 2;

// Check for serial communication
  if (Serial.available() > 0) {
    String message = Serial.readStringUntil('\n');  // Read the message until newline
    message.trim();  // Remove any extra spaces or newlines

    // Process received messages
    if (message == "SUCCESS") {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Access Granted");
      lcd.setCursor(0, 1);
      lcd.print("Gates - OPENING");
      motoropen();  // Open the gate
      Blynk.virtualWrite(V0, 1);
      delay(2000);
      Blynk.virtualWrite(V5, "Correct Password");
      Blynk.virtualWrite(V0, 0);
      motorclose();
    }
    else if (message == "FAILURE") {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Access Denied");
      lcd.setCursor(0, 1);
      lcd.print("Gates - CLOSED");
      motorclose();  // Close the gate
      delay(400);
      Blynk.virtualWrite(V0, 0);
      Blynk.virtualWrite(V5, "Take care, someone is trying to enter your home!");
    }
    
    else {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Invalid Command");
      delay(400);
    }
  }
  // If distance is greater than 10 cm, turn off the entire system
  if (distancecm > 10) {
    
    Blynk.virtualWrite(V1, "System Off");
    analogWrite(led1, 0);      // Ensure no brightness for LED 1
    analogWrite(led2, 0);      // Ensure no brightness for LED 2
    //motor1.write(90);          // Stop motor1
    //motor2.write(90);          // Stop motor2
    lcd.clear();               // Clear LCD
    lcd.setCursor(0, 0);
    lcd.print("System Off");
    return; // Exit the loop to stop everything
  }else{
     
    Blynk.virtualWrite(V1, "System on");
    lcd.setCursor(0, 0);
    lcd.print("LED: ON      "); // Display LED status
      analogWrite(led1, brightness);  //      // Ensure no brightness for LED 2
      analogWrite(led2, brightness);  //      // Ensure no brightness for LED 2
    delay(100);
    
    //Serial.println(ldrValue);
    //Serial.println(brightness1);
    lcd.setCursor(0, 1);
   lcd.print("Temperature: ");
   lcd.print(t);
  
  }

  
  
}

// Function to open the motor (gate)
void motorclose() {
  for (; pos <= 90; pos += 10) {
    motor1.write(pos);
    motor2.write(pos);
    delay(80);
    
  }
}

// Function to close the motor (gate)
void motoropen() {
  for (; pos >= 0; pos -= 10) {
    motor1.write(pos);
    motor2.write(pos+180);
    delay(80);
    
  }
}