#include <DHT.h>

#define DHTPIN 4          // DHT22 data pin connected to GPIO4
#define DHTTYPE DHT22     // Define the DHT type
DHT dht(DHTPIN, DHTTYPE);

#define GAS_SENSOR_PIN 34  // MQ sensor connected to GPIO34
#define PIR_SENSOR_PIN 27  // PIR motion sensor connected to GPIO27

void setup() {
    Serial.begin(115200);
    
    dht.begin();
    pinMode(GAS_SENSOR_PIN, INPUT);
    pinMode(PIR_SENSOR_PIN, INPUT);
    
    Serial.println("Sensors Initialized...");
}

void loop() {
    // Read temperature and humidity from DHT22
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();

    // Read gas sensor value
    int gasValue = analogRead(GAS_SENSOR_PIN);

    // Read PIR motion sensor state
    int pirState = digitalRead(PIR_SENSOR_PIN);

    // Display the sensor readings
    Serial.print("Temperature: "); Serial.print(temperature); Serial.println(" °C");
    Serial.print("Humidity: "); Serial.print(humidity); Serial.println(" %");
    Serial.print("Gas Sensor Value: "); Serial.println(gasValue);
    
    if (pirState == HIGH) {
        Serial.println("Motion Detected!");
    } else {
        Serial.println("No Motion");
    }

    Serial.println("--------------------");
    delay(2000); // Wait 2 seconds before next reading
}