#define BLYNK_TEMPLATE_ID "TMPL5qV9ugZYS"
#define BLYNK_TEMPLATE_NAME "Smart Home"
#define LED_PIN 22 // Define the pin for the single LED
#define DHT_PIN 4 // Define the pin where the DHT22 is connected
#define DHTTYPE DHT22 // Define the type of DHT sensor
#define BUZZER_PIN 15 // Define the pin for the buzzer

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

// Replace with your network credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Replace with your Blynk Auth Token
char auth[] = "HBMwrfscUyqmL1cucBsgPqR6eXxxgq_1";

DHT dht(DHT_PIN, DHTTYPE);

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

  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  dht.begin();
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  // Read temperature and humidity
  float h = dht.readHumidity();
  float t = dht.readTemperature(); // Read temperature as Celsius (the default)
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" *C");
noTone(BUZZER_PIN);
  // Check if temperature is higher than 40°C and activate buzzer
  if (t > 40) {
    tone(BUZZER_PIN, 3000); // Turn on the buzzer
  } else {
    noTone(BUZZER_PIN);;  // Turn off the buzzer
  }

  // Send temperature and humidity to Blynk
  Blynk.virtualWrite(V1, t);  // Assuming you have a gauge widget on V1 for temperature
  Blynk.virtualWrite(V2, h);  // Assuming you have a gauge widget on V3 for humidity

  Blynk.run();
  delay(1000);  // Wait for 1 second before next reading
}

// Function to control the LED based on Blynk virtual pin V0
BLYNK_WRITE(V0) {
  int pinValue = param.asInt(); // Get the value sent from Blynk app
  analogWrite(LED_PIN, pinValue);
}