#define BLYNK_TEMPLATE_ID "TMPL3wLaoDT1D"
#define BLYNK_TEMPLATE_NAME "sahil"
#define BLYNK_AUTH_TOKEN "eJiwDUD5SG_7tgcZdt_Hr2tBs7gyqCtC"
#include <DHT.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>


#define DHTPIN 25  // Pin connected to the DHT22 sensor
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Pins for Ultrasonic sensors
#define TRIG1 2
#define ECHO1 4
#define TRIG2 5
#define ECHO2 18
#define TRIG3 19
#define ECHO3 21

// Pins for PIR sensors
#define PIR1 22
#define PIR2 23
#define PIR3 26

// Pins for Flame sensors
#define FLAME1 27
#define FLAME2 32
#define FLAME3 33

// Pin for Buzzer
#define BUZZER 15

// Blynk credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
char auth[] = BLYNK_AUTH_TOKEN;


void setup() {
  Serial.begin(115200);

  // Initialize WiFi and Blynk
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi connected");
  Blynk.begin(auth, ssid, pass);

  // Initialize DHT22
  dht.begin();

  // Initialize pins for ultrasonic sensors
  pinMode(TRIG1, OUTPUT);
  pinMode(ECHO1, INPUT);
  pinMode(TRIG2, OUTPUT);
  pinMode(ECHO2, INPUT);
  pinMode(TRIG3, OUTPUT);
  pinMode(ECHO3, INPUT);

  // Initialize pins for PIR sensors
  pinMode(PIR1, INPUT);
  pinMode(PIR2, INPUT);
  pinMode(PIR3, INPUT);

  // Initialize pins for flame sensors
  pinMode(FLAME1, INPUT);
  pinMode(FLAME2, INPUT);
  pinMode(FLAME3, INPUT);

  // Initialize buzzer
  pinMode(BUZZER, OUTPUT);
  digitalWrite(BUZZER, LOW);
}

// Function to measure distance from ultrasonic sensor
long measureDistance(int trigPin, int echoPin) {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  long duration = pulseIn(echoPin, HIGH);
  long distance = duration * 0.034 / 2; // Convert to cm
  return distance;
}

void loop() {
  Blynk.run();

  // Ultrasonic sensor readings
  long distance1 = measureDistance(TRIG1, ECHO1);
  long distance2 = measureDistance(TRIG2, ECHO2);
  long distance3 = measureDistance(TRIG3, ECHO3);

  // PIR sensor readings
  int motion1 = digitalRead(PIR1);
  int motion2 = digitalRead(PIR2);
  int motion3 = digitalRead(PIR3);

  // Flame sensor readings
  int flame1 = digitalRead(FLAME1);
  int flame2 = digitalRead(FLAME2);
  int flame3 = digitalRead(FLAME3);

  // Activate buzzer if flame is detected
  if (!flame1 || !flame2 || !flame3) {
    digitalWrite(BUZZER, HIGH);
  } else {
    digitalWrite(BUZZER, LOW);
  }

  // DHT22 sensor readings
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if DHT22 data is valid
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
  } else {
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.println(" *C");

    Serial.print("Humidity: ");
    Serial.print(humidity);
    Serial.println(" %");

    // Update DHT readings on Blynk server
    Blynk.virtualWrite(V0, temperature);
    Blynk.virtualWrite(V1, humidity);
  }

  // Update room 1 readings on Blynk server
  Blynk.virtualWrite(V2, distance1);
  Blynk.virtualWrite(V3, motion1);
  Blynk.virtualWrite(V4, !flame1);

  // Update room 2 readings on Blynk server
  Blynk.virtualWrite(V5, distance2);
  Blynk.virtualWrite(V6, motion2);
  Blynk.virtualWrite(V7, !flame2);

  // Update room 3 readings on Blynk server
  Blynk.virtualWrite(V8, distance3);
  Blynk.virtualWrite(V9, motion3);
  Blynk.virtualWrite(V10, !flame3);

  // Print readings for each room
  Serial.println("Room 1:");
  Serial.print("Distance: ");
  Serial.print(distance1);
  Serial.println(" cm");
  Serial.print("Motion Detected: ");
  Serial.println(motion1 ? "Yes" : "No");
  Serial.print("Flame Detected: ");
  Serial.println(flame1 ? "No" : "Yes");

  Serial.println("Room 2:");
  Serial.print("Distance: ");
  Serial.print(distance2);
  Serial.println(" cm");
  Serial.print("Motion Detected: ");
  Serial.println(motion2 ? "Yes" : "No");
  Serial.print("Flame Detected: ");
  Serial.println(flame2 ? "No" : "Yes");

  Serial.println("Room 3:");
  Serial.print("Distance: ");
  Serial.print(distance3);
  Serial.println(" cm");
  Serial.print("Motion Detected: ");
  Serial.println(motion3 ? "Yes" : "No");
  Serial.print("Flame Detected: ");
  Serial.println(flame3 ? "No" : "Yes");

  Serial.println("--------------------------");

  delay(2000); // Delay between readings
}