#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>

// Blynk authentication token
#define BLYNK_AUTH_TOKEN "VNYANE5V3JeWQhfTTxwzNKFKzPn1is5n"  // Enter your Blynk auth token

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST"; // Enter your WiFi name
char pass[] = ""; // Enter your WiFi password

// Define LED pins
const int led1Pin = 4;
const int led2Pin = 0;
const int led3Pin = 2;

// Define DHT sensor pin and type
#define DHTPIN 13 // DHT22 sensor connected to GPIO 15
#define DHTTYPE DHT22 // DHT 22 (AM2302)
DHT dht(DHTPIN, DHTTYPE);

// Blynk virtual pins
#define BUTTON1_PIN V0
#define BUTTON2_PIN V1
#define BUTTON3_PIN V2
#define TEMP_PIN V3
#define HUM_PIN V4

BLYNK_WRITE(BUTTON1_PIN) {
  int buttonState = param.asInt();
  digitalWrite(4, buttonState);
}

BLYNK_WRITE(BUTTON2_PIN) {
  int buttonState = param.asInt();
  digitalWrite(0, buttonState);
}

BLYNK_WRITE(BUTTON3_PIN) {
  int buttonState = param.asInt();
  digitalWrite(2, buttonState);
}

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

  // Initialize the LED pins as outputs
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  pinMode(led3Pin, OUTPUT);

  // Initialize the DHT sensor
  dht.begin();

  // Initialize Blynk
  Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);
}

void loop() {
  // Run Blynk
  Blynk.run();

  // Read temperature and humidity data from DHT22
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if any reads failed and exit early (to try again)
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Print temperature and humidity data to the serial monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C ");
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  // Send temperature and humidity data to Blynk
  Blynk.virtualWrite(TEMP_PIN, temperature);
  Blynk.virtualWrite(HUM_PIN, humidity);

  // Wait a few seconds between measurements
  delay(2000);
}