#define BLYNK_TEMPLATE_ID "TMPL5sqdHaV62"
#define BLYNK_TEMPLATE_NAME "IOT Assignment"
#define BLYNK_AUTH_TOKEN "lcT69KMpwiXSms5yAZIHTEcCGT--g2gK"

// Include libraries
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// Define pins
#define POT_PIN 32    // Potentiometer (simulating MQ-2 sensor)
#define LED_PIN 22    // LED
#define BUZZER_PIN 23 // Buzzer

// Blynk authentication token
char auth[] = BLYNK_AUTH_TOKEN;

// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Variables
int sensorValue = 0;
int threshold = 500; // Set a threshold value for smoke detection

BlynkTimer timer;

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  Serial.println("Starting...");

  // Initialize Blynk
  Blynk.begin(auth, ssid, pass);

  // Initialize pins
  pinMode(POT_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  Serial.println("Setup complete");
  // Timer to check sensor value
  timer.setInterval(1000L, checkSensor);

}

void checkSensor() {
  // Read the potentiometer value (simulate smoke sensor)
  sensorValue = analogRead(POT_PIN);
  Serial.println(sensorValue);

  // Update Blynk gauge
  Blynk.virtualWrite(V1, sensorValue);

  // Check if sensor value exceeds threshold
  if (sensorValue > threshold) {
    digitalWrite(LED_PIN, HIGH);
    digitalWrite(BUZZER_PIN, HIGH);
    Blynk.virtualWrite(V0, 1); // Turn on virtual LED
    // Blynk.notify("Smoke detected!");
    Blynk.virtualWrite(V2, 255);
  } else {
    digitalWrite(LED_PIN, LOW);
    digitalWrite(BUZZER_PIN, LOW);
    Blynk.virtualWrite(V0, 0); // Turn off virtual LED
    Blynk.virtualWrite(V2, 0);
  }
}

void loop() {
  Blynk.run();
  timer.run();
}