#include <DHT.h>
#include <Arduino.h>
#if defined(ESP32)
  #include <WiFi.h>
#elif defined(ESP8266)
  #include <ESP8266WiFi.h>
#endif
#include <HTTPClient.h> // Untuk mengirim data ke Thingspeak

#define DHTPIN 5 // Pin sensor DHT menggunakan D5
#define DHTTYPE DHT11 // Tipe sensor DHT
DHT dht(DHTPIN, DHTTYPE); // Membuat objek DHT

String apiKey = "4HULUZC8VDZXCSN2"; // Ganti dengan API key Thingspeak 
const char* ssid = "CIPA CEPU";  // Ganti dengan SSID WiFi
const char* pass = "CEP1234U"; // Ganti dengan Password WiFi
const char* server = "api.thingspeak.com"; // Server ThingSpeak

WiFiClient client; // Objek WiFiClient

void setup()
{
  Serial.begin(115200);
  delay(10);
  dht.begin(); // Memulai sensor DHT

  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");
}

void loop()
{
  // Membaca data dari sensor DHT
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  // Memeriksa apakah data valid
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor");
    return;
  }

  // Mengirim data ke ThingSpeak
  if (client.connect(server, 80)) {
    String postStr = "api_key=" + apiKey;
    postStr += "&field1=" + String(t); // Mengirim data suhu
    postStr += "&field2=" + String(h); // Mengirim data kelembapan
    postStr += "\r\n\r\n";

    client.print("POST /update HTTP/1.1\n");
    client.print("Host: " + String(server) + "\n");
    client.print("Connection: close\n");
    client.print("Content-Type: application/x-www-form-urlencoded\n");
    client.print("Content-Length: " + String(postStr.length()) + "\n\n");
    client.print(postStr);

    Serial.println("Data sent to ThingSpeak");
    client.stop();
  } else {
    Serial.println("Failed to connect to ThingSpeak");
  }

  // Delay 20 detik (ThingSpeak membatasi pengiriman tiap 15 detik)
  delay(20000);
}