#define BLYNK_PRINT Serial

#define BLYNK_TEMPLATE_ID "TMPL6QgI_CH1M"
#define BLYNK_TEMPLATE_NAME"Indoor Air Quality Monitoring"
#define BLYNK_AUTH_TOKEN "K7A3rEUcEGrn6OoI_NAMJWDcAMoMp_hK"

// ================= BATAS GAS ================= 
#define GAS_WASPADA 1000 
#define GAS_DARURAT 1800 

#include <WiFi.h> 
#include <BlynkSimpleEsp32.h> 
#include <DHT.h> 
#include <ESP32Servo.h> 
// ================= WIFI ================= 
char ssid[] = "Wokwi-GUEST"; 
char pass[] = ""; 

// ================= PIN ================= 
#define DHTPIN 4 
#define DHTTYPE DHT22 
#define MQ2_PIN 34 
#define SERVO_PIN 18 
#define RELAY_PIN 19 
#define BUZZER 23 

DHT dht(DHTPIN, DHTTYPE); 
Servo servoVentilasi; 

void setup() { 
  Serial.begin(115200); 
  delay(1000); 

  pinMode(RELAY_PIN, OUTPUT); 
  pinMode(BUZZER, OUTPUT); 

  digitalWrite(RELAY_PIN, HIGH); // listrik awal ON 

  servoVentilasi.attach(SERVO_PIN); 
  servoVentilasi.write(90); 

  dht.begin(); 
  delay(3000); 

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass); 
} 
void loop() {
  Blynk.run();

  float suhu = dht.readTemperature();
  float hum  = dht.readHumidity();
  int gasValue = analogRead(MQ2_PIN);

  Serial.print("Suhu: ");
  Serial.print(suhu);
  Serial.print(" C | Hum: ");
  Serial.print(hum);
  Serial.print(" % | Gas: ");
  Serial.println(gasValue);

  // Kirim ke Blynk
  Blynk.virtualWrite(V0, suhu);
  Blynk.virtualWrite(V1, hum);
  Blynk.virtualWrite(V2, gasValue);

  // ================= LOGIKA KONDISI =================

  if (gasValue < GAS_WASPADA) {
    // NORMAL
    digitalWrite(RELAY_PIN, HIGH);
    noTone(BUZZER);
    servoVentilasi.write(0); 

    Blynk.virtualWrite(V3, 0);
    Blynk.virtualWrite(V4, 0);
    Blynk.virtualWrite(V5, 1);
    Blynk.virtualWrite(V6, 0);

  } else if (gasValue < GAS_DARURAT) {
    // WASPADA
    digitalWrite(RELAY_PIN, HIGH);
    noTone(BUZZER);
    servoVentilasi.write(90); 

    Blynk.virtualWrite(V3, 1);
    Blynk.virtualWrite(V4, 0);
    Blynk.virtualWrite(V5, 1);
    Blynk.virtualWrite(V6, 1);

  } else {
    // DARURAT
    digitalWrite(RELAY_PIN, LOW);
    tone(BUZZER, 1000);
    servoVentilasi.write(90); 

    Blynk.virtualWrite(V3, 2);
    Blynk.virtualWrite(V4, 1);
    Blynk.virtualWrite(V5, 0);
    Blynk.virtualWrite(V6, 1);
  }

  delay(2000);
}