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

#define DHTPIN 21
#define DHTTYPE DHT22

Servo myservo;
int pos = 0;

DHT dht(DHTPIN, DHTTYPE);

#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_LINES 4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
#define THINGSPEAK_API_KEY "4MHZXUUJ3CY5Q1KD"
#define THINGSPEAK_CHANNEL_ID 2394410

const long updateInterval = 1 * 1000;
unsigned long lastUpdate = 0;

WiFiClient client;

void setup() {
  Serial.begin(9600);
  delay(2000); // 2 saniye bekle
  myservo.attach(22); // Servo pinini uygun pinle değiştirin
  dht.begin();
  lcd.init();
  lcd.backlight();

  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  ThingSpeak.begin(client);
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("NEM DEGERI=");
  lcd.setCursor(11, 0);
  
  if (!isnan(humidity)) {
    lcd.print(humidity);
    lcd.setCursor(16, 0);
    lcd.print("C");

    if (humidity <= 30) {
      myservo.write(90); // Servo kolunu aşağıya çek
      lcd.setCursor(0, 1);
      lcd.print("DURUM= SU  ACIK");
    } else {
      myservo.write(0); // Servo kolunu yukarı çek
      lcd.setCursor(0, 1);
      lcd.print("DURUM= SU KAPALI");
    }
  } else {
    lcd.print("HATA"); // Eğer nem değeri geçerli değilse hata mesajı yazdır
  }

  unsigned long currentMillis = millis();

  if (currentMillis - lastUpdate >= updateInterval) {
    ThingSpeak.writeField(THINGSPEAK_CHANNEL_ID, 1, temperature, THINGSPEAK_API_KEY);
    ThingSpeak.writeField(THINGSPEAK_CHANNEL_ID, 2, humidity, THINGSPEAK_API_KEY);
    lastUpdate = currentMillis;
  }
}