#define BLYNK_TEMPLATE_ID "TMPL3HmwQ_GF1"
#define BLYNK_TEMPLATE_NAME "DHT22"
#define BLYNK_AUTH_TOKEN "Jcpa2iDay0k0PrjfN02W-K60w6W-es-z"

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

char ssid[] = "Wokwi-GUEST";  // Replace with your WiFi SSID
char pass[] = "";             // Replace with your WiFi password if any

#define DHT_DATA 18
#define DHT_TYPE DHT22
#define MQ2_ANALOG 27
#define MQ2_DIGITAL 35

DHT dht(DHT_DATA, DHT_TYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  pinMode(MQ2_DIGITAL, INPUT);
}

void loop() {
  Blynk.run();

  delay(2000);

  float temp_value = dht.readTemperature();
  float hum_value = dht.readHumidity();

  int gasAnalog = analogRead(MQ2_ANALOG);
  int gasDigital = digitalRead(MQ2_DIGITAL);

  Serial.println("===== Environmental Data =====");
  Serial.print("Temperature: ");
  Serial.println(temp_value);
  Serial.print("Humidity: ");
  Serial.println(hum_value);
  Serial.print("MQ2 Analog: ");
  Serial.println(gasAnalog);
  Serial.print("MQ2 Digital: ");
  Serial.println(gasDigital);
  Serial.println("==============================\n");

  if (!isnan(temp_value)) {
    Blynk.virtualWrite(V0, temp_value);
  }
  if (!isnan(hum_value)) {
    Blynk.virtualWrite(V1, hum_value);
  }

  Blynk.virtualWrite(V2, gasAnalog);
  Blynk.virtualWrite(V3, gasDigital);
}