#include "DHT.h"

#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

int gasPin = A0;
int flamePin = A1;
int buzzer = 3;
int greenLED = 4, yellowLED = 5, redLED = 6;

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(buzzer, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(yellowLED, OUTPUT);
  pinMode(redLED, OUTPUT);
}

void loop() {
  int gasValue = analogRead(gasPin);
  int flameValue = analogRead(flamePin);
  float temp = dht.readTemperature();

  Serial.print("Gas: "); Serial.print(gasValue);
  Serial.print(" | Flame(LDR): "); Serial.print(flameValue);
  Serial.print(" | Temp: "); Serial.println(temp);

  if (gasValue > 600 || flameValue < 300 || temp > 50) {
    digitalWrite(buzzer, HIGH);
    digitalWrite(redLED, HIGH);
    digitalWrite(greenLED, LOW);
    digitalWrite(yellowLED, LOW);
  } 
  else if (gasValue > 300 || temp > 35) {
    digitalWrite(buzzer, LOW);
    digitalWrite(yellowLED, HIGH);
    digitalWrite(redLED, LOW);
    digitalWrite(greenLED, LOW);
  } 
  else {
    digitalWrite(buzzer, LOW);
    digitalWrite(greenLED, HIGH);
    digitalWrite(yellowLED, LOW);
    digitalWrite(redLED, LOW);
  }

  delay(1000);
}