#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>



// DHT22 Setup
#define DHTPIN 15  
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// PIR Sensor Setup
#define PIR_PIN 18

// MQ-2 Sensor Setup
#define MQ2_PIN 34

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

  // Initialize DHT22
  dht.begin();

  // PIR Sensor
  pinMode(PIR_PIN, INPUT);
}

void loop() {
  // DHT22 - Temperature & Humidity
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  if (!isnan(h) && !isnan(t)) {
    Serial.print("Humidity: ");
    Serial.print(h);
    Serial.print("%  Temperature: ");
    Serial.print(t);
    Serial.println("°C");
  }

  // PIR Sensor - Motion Detection
  int pirState = digitalRead(PIR_PIN);
  if (pirState == HIGH) {
    Serial.println("Motion detected!");
  } else {
    Serial.println("No motion detected.");
  }

  // MQ-2 - Gas Sensor
  int mq2Value = analogRead(MQ2_PIN);
  Serial.print("MQ-2 Gas Sensor Value: ");
  Serial.println(mq2Value);

  delay(2000);
}