#include <WiFi.h>
#include <ThingSpeak.h>
#include <DHT.h>
#include <Servo.h>

// Kredensial WiFi
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// ThingSpeak
unsigned long myChannelNumber = 2994594;
const char* myWriteAPIKey = "K6FNF49EHGEA1IDS";

// DHT sensor
#define DHTPIN 0
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Ultrasonic sensor
#define TRIGPIN 4
#define ECHOPIN 2

//Relay dan servo
#define RELAYPIN 5
#define SERVOPIN 15
Servo myServo;
WiFiClient client;

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

  pinMode(TRIGPIN, OUTPUT);
  pinMode(ECHOPIN, INPUT);
  pinMode(RELAYPIN, OUTPUT);
  myServo.attach(SERVOPIN, 500, 2400);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Menghubungkan ke Wi-Fi...");
  }
  Serial.println("Terhubung ke Wi-Fi");

  ThingSpeak.begin(client);
}

void loop() {
  // Read DHT sensor
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Membaca Ultrasonic sensor
  long duration, distance;
  digitalWrite(TRIGPIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGPIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGPIN, LOW);
  duration = pulseIn(ECHOPIN, HIGH);
  distance = (duration / 2) / 29.1;

  // Print nilai sensor
  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.print(" °C, Kelembapan: ");
  Serial.print(humidity);
  Serial.print(" %, Jarak: ");
  Serial.print(distance);
  Serial.println(" cm");

  if (temperature > 30.0) {
    digitalWrite(RELAYPIN, HIGH); // Mengaktifkan relay jika suhu > 30°C
  } else {
    digitalWrite(RELAYPIN, LOW); // Mematikan relay jika suhu <= 30°C
  }

  if (distance < 100) {
    myServo.write(90);  // Buka
  } else {
    myServo.write(0);   // Tutup
  }

  // Tulis data ke ThingSpeak
  ThingSpeak.setField(1, temperature);
  ThingSpeak.setField(2, humidity);
  ThingSpeak.setField(3, distance);

  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (x == 200) {
    Serial.println("Update channel berhasil.");
  } else {
    Serial.println("Masalah update channel. Kode kesalahan HTTP " + String(x));
  }

  delay(20000); // Waktu update data ke ThingSpeak 20 detik
}