#include <WiFi.h>
#include <DHT.h>
#include <ESP32Servo.h>
#include <HTTPClient.h>

#define DHTPIN 15
#define DHTTYPE DHT22
#define MQ2PIN 32
#define RELAYPIN 13
#define SERVOPIN 16

const char* ssid = "Wokwi-GUEST";
const char* password = "";

// ThingSpeak settings
const char* server = "https://api.thingspeak.com/update?api_key=55CTGUZTCLJ4HROK&field1=";
const char* apiKey = "N1PWR2SNEQP1VGR9"; // Ganti dengan API Key Anda

DHT dhtku(DHTPIN, DHTTYPE);
Servo servoku;

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");

  dhtku.begin();
  
  pinMode(MQ2PIN, INPUT);
  pinMode(RELAYPIN, OUTPUT);
  digitalWrite(RELAYPIN, LOW);
  
  // Inisialisasi servo
  servoku.attach(16);
  servoku.write(0); // Servo di posisi awal (0 derajat)
}

void loop() {
  // Membaca data dari sensor
  float temperature = dhtku.readTemperature();
  float gasValue = analogRead(32);

  // Menampilkan data di Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");
  Serial.print("Gas Value: ");
  Serial.println(gasValue);

  // Logika kontrol kipas
  if (temperature > 30 || gasValue > 300) {
    digitalWrite(RELAYPIN, HIGH); // Aktifkan kipas
    servoku.write(90); // Gerakkan servo ke posisi 90 derajat
    Serial.println("Fan ON, Servo at 90 degrees");
  } else {
    digitalWrite(RELAYPIN, LOW); // Matikan kipas
    servoku.write(0); // Kembalikan servo ke posisi 0 derajat
    Serial.println("Fan OFF, Servo at 0 degrees");
  }

  // Mengirim data ke ThingSpeak
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String url = String(server) + "?api_key=" + apiKey + "&field1=" + String(temperature) + "&field2=" + String(gasValue);
    http.begin(url);
    int httpResponseCode = http.GET();

    if (httpResponseCode > 0) {
      Serial.print("Data sent to ThingSpeak. HTTP Response Code: ");
      Serial.println(httpResponseCode);
    } else {
      Serial.print("Error sending data. HTTP Response Code: ");
      Serial.println(httpResponseCode);
    }

    http.end();
  } else {
    Serial.println("WiFi not connected, skipping ThingSpeak update.");
  }

  delay(2000); // Delay 2 detik
}