#include <DHT.h>
#include <WiFi.h>
#include <HTTPClient.h>

#define DHTPIN 4  // DHT22 data pin connected to GPIO 4
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

#define FIREBASE_HOST "iot-aqi-94857-default-rtdb.asia-southeast1.firebasedatabase.app/"
#define FIREBASE_AUTH "q2ByieDXT6kwCYSy3XCHRZH4e9cwfsoavvDHRi2X"
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

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

  // Connect to Wi-Fi
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Initialize DHT sensor
  dht.begin();
}

void loop() {
  // Wait a few seconds between measurements
  delay(2000);

  // Read temperature and humidity from the DHT sensor
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Check if reading was successful
  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Send data to Firebase
  String path = "/sensor-data";
  String url = String("https://") + FIREBASE_HOST + path + ".json?auth=" + FIREBASE_AUTH;
  String data = "{\"humidity\": " + String(humidity) + ", \"temperature\": " + String(temperature) + "}";

  // Make an HTTP PUT request to Firebase
  HTTPClient http;
  http.begin(url, "DUMMY_FINGERPRINT");
  http.begin(url);
  http.addHeader("Content-Type", "application/json");
  int httpResponseCode = http.PUT(data);
  http.end();

  // Check if the request was successful
  if (httpResponseCode > 0) {
    Serial.println("Data sent to Firebase successfully!");
  } else {
    Serial.println("Failed to send data to Firebase!");
    Serial.println("HTTP Response code: " + String(httpResponseCode));
  }
}