# include "DHT.h"
// konfigurasi DHT22
#define  DHIPIN 2
#define DHTTYPE DHT22
DHT dht(DHIPIN, DHTTYPE);

// konfigurasi potensiometer sebagai Simulator MQ-2
#define MQ2_PIN A0 // pin analog untuk potensiometer

 // pin output
#define led 11
#define buzzer 12
#define relay 3

// Threshold 
const float SUHU_BAHAYA = 60.0;   // C
const float KELEMBABAN_BAHAYA = 30.0; // %
const int GAS_BAHAYA = 200;  // ppm (asap)
void setup(){
  Serial .begin(115200);
  dht.begin();

  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(relay, OUTPUT);

  Serial .println(F("Sistem Deteksi kebakaran(wokwi)"));
}
void loop(){
  float suhu = dht.readTemperature();
  float kelembaban = dht.readHumidity();
  int gasValue = analogRead(MQ2_PIN);

  if (isnan(suhu) || isnan (kelembaban)){
    Serial.println(F("Error membaca DHT22!"));
    return;
  }
  bool bahaya = (suhu >= SUHU_BAHAYA) ||
                (kelembaban <=KELEMBABAN_BAHAYA) ||
                (gasValue >=GAS_BAHAYA);

  digitalWrite(led, bahaya ? HIGH : LOW);
  digitalWrite(relay, bahaya ? HIGH : LOW);   
  if (bahaya){
    tone(buzzer, 500, 1000);
    digitalWrite(led, HIGH);
  }else{
    noTone(buzzer);
  } 
  Serial.print(F("Suhu: "));  
  Serial.print(suhu);
  Serial.print(F(" C | "));
  Serial.print(F("Kelembaban: "));    
  Serial.print(kelembaban); 
  Serial.print(F("% | "));
  Serial.print(F("Gas: "));  
  Serial.print(gasValue);
  Serial.print(F("/1023"));
  delay(2000);
}