#include 
#include 
#include "DHT.h"

// WiFi credentials
const char* ssid = "IoT_Lab";
const char* password = "embedded123";

// MQTT Broker
const char* mqtt_server = "broker.hivemq.com";

// Sensor pins
#define DHT_PIN 4
#define PIR_PIN 5
#define MQ135_PIN 34

DHT dht(DHT_PIN, DHT22);
WiFiClient espClient;
PubSubClient client(espClient);

// Sensor data structure
struct SensorData {
    float temperature;
    float humidity;
    bool motion;
    int airQuality;
    unsigned long timestamp;
};

void setup() {
    Serial.begin(115200);
    setupWiFi();
    setupMQTT();
    setupSensors();
}

void loop() {
    if (!client.connected()) {
        reconnectMQTT();
    }
    client.loop();
    
    SensorData data = readSensors();
    publishData(data);
    
    delay(10000); // Send data every 10 seconds
}

SensorData readSensors() {
    SensorData data;
    data.timestamp = millis();
    
    // Read DHT22
    data.temperature = dht.readTemperature();
    data.humidity = dht.readHumidity();
    
    // Read PIR
    data.motion = digitalRead(PIR_PIN);
    
    // Read MQ135
    data.airQuality = analogRead(MQ135_PIN);
    
    return data;
}