#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <ESP32Servo.h>
#include <WiFi.h>
#include <HTTPClient.h>

#define DHT_PIN 15
#define LDR_PIN 34
#define LED1_PIN 13
#define LED2_PIN 14
#define LED3_PIN 26
#define LED4_PIN 27
#define SERVO_PIN 32

#define SDA_PIN 21
#define SCL_PIN 22

DHT dht(DHT_PIN, DHT22);
Servo servo;

LiquidCrystal_I2C lcd(0x27, 20, 4);

const int suhuBatasAtas = 30;
const int suhuBatasBawah = 18;
const int kelembapanBatasAtas = 80;
const int kelembapanBatasBawah = 40;

// Wi-Fi Credentials
const char* ssid = "Wokwi-GUEST"; // Ganti dengan SSID Wi-Fi kamu jika diperlukan
const char* password = ""; // Ganti dengan password jika diperlukan

// ThingSpeak API Key
const String apiKey = "YOUR_THINGSPEAK_API_KEY"; // Ganti dengan API Key ThingSpeak

WiFiClient client;
HTTPClient http;

void setup() {
  Serial.begin(115200);
  Wire.begin(SDA_PIN, SCL_PIN);
  dht.begin();
  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);
  pinMode(LED3_PIN, OUTPUT);
  pinMode(LED4_PIN, OUTPUT);
  servo.attach(SERVO_PIN);
  servo.write(0);
  lcd.begin(20, 4);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Selamat datang di sistem");
  lcd.setCursor(0, 1);
  lcd.print("pemantauan smart farming");
  lcd.setBacklight(1);
  delay(200);

  // Connect to Wi-Fi
  Serial.print("Mencoba menghubungkan ke Wi-Fi");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Terhubung!");
  Serial.println("IP Address: " + WiFi.localIP().toString());
}

void loop() {
  // Baca sensor
  int suhu = dht.readTemperature();
  int kelembapan = dht.readHumidity();
  int ldrValue = analogRead(LDR_PIN);
  float lux = map(ldrValue, 0, 4095, 0, 1000);
  
  // Kirim data ke ThingSpeak
  sendToThingSpeak(suhu, kelembapan, lux);
  
  // Kontrol LED dan Servo
  kontrolLED(ldrValue);
  kontrolServo(suhu);

  // Tampilkan data di LCD
  tampilkanDataLCD(suhu, kelembapan, lux);

  delay(400);
}

void sendToThingSpeak(int suhu, int kelembapan, float lux) {
  if (WiFi.status() == WL_CONNECTED) {
    http.begin(client, "http://api.thingspeak.com/update");
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");

    // Data untuk dikirim
    String httpRequestData = "api_key=" + apiKey + 
                             "&field1=" + String(suhu) + 
                             "&field2=" + String(kelembapan) + 
                             "&field3=" + String(lux);

    // Kirim data ke ThingSpeak
    int httpResponseCode = http.POST(httpRequestData);

    if (httpResponseCode > 0) {
      Serial.println("Data berhasil dikirim ke ThingSpeak");
    } else {
      Serial.println("Terjadi kesalahan saat mengirim data ke ThingSpeak");
    }

    http.end();
  } else {
    Serial.println("Wi-Fi tidak terhubung");
  }
}

void kontrolLED(int ldrValue) {
  if (ldrValue < 1000) {
    digitalWrite(LED1_PIN, HIGH);
    digitalWrite(LED2_PIN, HIGH);
    digitalWrite(LED3_PIN, HIGH);
    digitalWrite(LED4_PIN, HIGH);
  } else {
    digitalWrite(LED1_PIN, LOW);
    digitalWrite(LED2_PIN, LOW);
    digitalWrite(LED3_PIN, LOW);
    digitalWrite(LED4_PIN, LOW);
  }
}

void kontrolServo(int suhu) {
  if (suhu > suhuBatasAtas) {
    servo.write(90);
  } else {
    servo.write(0);
  }
}

void tampilkanDataLCD(int suhu, int kelembapan, float lux) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(suhu);
  lcd.print(" C");
  lcd.setCursor(0, 1);
  lcd.print("Kelembapan: ");
  lcd.print(kelembapan);
  lcd.print(" %");
  lcd.setCursor(0, 2);
  lcd.print("LDR: ");
  lcd.print(lux);
  lcd.print(" lux");
  lcd.setCursor(0, 3);
  if (suhu > suhuBatasAtas) {
    lcd.print("Ventilasi: Terbuka");
  } else {
    lcd.print("Ventilasi: Tertutup");
  }
  delay(500);
}