#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

// Define pins
#define FLAME_SENSOR_PIN 5       // Simulating flame sensor using a push button
#define GAS_SENSOR_PIN 34        // Simulating gas sensor using a potentiometer
#define LED_PIN 2                // LED for alert
#define BUZZER_PIN 4             // Buzzer for alert

// Define Wi-Fi credentials (update with your network info)
const char* ssid = "your_SSID";       // Replace with your Wi-Fi SSID
const char* password = "your_PASSWORD"; // Replace with your Wi-Fi password

// Define Blynk authentication token (replace with the one received via email)
char auth[] = "EZ3-4DOs0LIfhcMm7KoC9jpU0fKRu6YD"; // Replace with your token

// Template Information (for Blynk IoT)
#define BLYNK_TEMPLATE_ID "TMPL3k3RX2Fkj"
#define BLYNK_TEMPLATE_NAME "fire detection"

// Initialize Blynk
BlynkTimer timer;

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);

  // Initialize pins
  pinMode(FLAME_SENSOR_PIN, INPUT_PULLUP);  // Flame sensor as input (button)
  pinMode(GAS_SENSOR_PIN, INPUT);           // Gas sensor as analog input
  pinMode(LED_PIN, OUTPUT);                 // LED as output
  pinMode(BUZZER_PIN, OUTPUT);              // Buzzer as output

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  Serial.println("Connecting to Wi-Fi...");
  
  unsigned long startAttemptTime = millis();
  // Attempt to connect for 10 seconds max
  while (WiFi.status() != WL_CONNECTED && millis() - startAttemptTime < 10000) {
    delay(1000);
    Serial.println("Attempting to connect to Wi-Fi...");
  }
  
  if (WiFi.status() == WL_CONNECTED) {
    Serial.println("Connected to Wi-Fi");
  } else {
    Serial.println("Failed to connect to Wi-Fi within timeout!");
    return;  // Exit setup if Wi-Fi connection fails
  }

  // Connect to Blynk server using the template-based system
  Blynk.begin(auth, ssid, password, BLYNK_TEMPLATE_ID, BLYNK_TEMPLATE_NAME);

  // Set up a function to send sensor data every 2 seconds
  timer.setInterval(2000L, sendSensorData);
}

void loop() {
  // Run Blynk and timer
  Blynk.run();
  timer.run();
}

void sendSensorData() {
  // Read flame sensor (push button)
  int flameStatus = digitalRead(FLAME_SENSOR_PIN);

  // Read gas sensor (potentiometer)
  int gasLevel = analogRead(GAS_SENSOR_PIN);

  // Print sensor values for debugging
  Serial.print("Flame Status: ");
  Serial.print(flameStatus);
  Serial.print(" | Gas Level: ");
  Serial.println(gasLevel);

  // Send data to Blynk app (send data to virtual pins)
  Blynk.virtualWrite(V1, flameStatus);  // Send flame status to virtual pin V1
  Blynk.virtualWrite(V2, gasLevel);     // Send gas level to virtual pin V2

  // If flame or gas detected (adjust thresholds as needed)
  if (flameStatus == LOW || gasLevel > 500) {
    // Turn on LED and Buzzer
    digitalWrite(LED_PIN, HIGH);
    digitalWrite(BUZZER_PIN, HIGH);

    // Send an alert via Blynk (using virtual pin V3 to indicate alert)
    Blynk.virtualWrite(V3, 1);  // V3 could be used for an alert (1 = active)

  } else {
    // Turn off LED and Buzzer
    digitalWrite(LED_PIN, LOW);
    digitalWrite(BUZZER_PIN, LOW);

    // Reset alert
    Blynk.virtualWrite(V3, 0);  // V3 = 0 to indicate no alert
  }
}