//---------------------SMmart-Greenhouse-IOT-Project-By-Deniz-Lehmann-23120003008----------------------------
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <WiFi.h>
#include <ThingSpeak.h>
#include <ESP32Servo.h>


#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
#define THINGSPEAK_API_KEY "GMYWA336MF4YR4BV"
#define THINGSPEAK_CHANNEL_ID 2386314
// Pin Definitions
#define LDR_PIN         34    //LDR Sensor pin connection
#define YELLOW_LED_PIN  32    //Yellow LED pin connection
#define RED_LED_PIN     17    //Red LED pin connection
#define SERVO_PIN       23    //Servo pin connection



LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 20, 4);
DHT dht(4, DHT22);
Servo servo;  

const long updateInterval = 1 * 1000;  // Updates ThingSpeak every seconds
unsigned long lastUpdate = 0;

WiFiClient client;

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

  LCD.init();
  delay(1000);
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Initializing...");

  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN , OUTPUT);

  dht.begin();
  servo.attach(23);  // Attach servo to pin 23

  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Connecting to WiFi...");
  }

  ThingSpeak.begin(client);
}

void loop() {
  unsigned long currentMillis = millis();

  if (currentMillis - lastUpdate >= updateInterval) {
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();
    int ldrValue = analogRead(LDR_PIN);
    
    if (isnan(humidity) || isnan(temperature) || isnan(ldrValue)) {
      delay(2000);
      return;
    }


    LCD.clear();
    LCD.setCursor(0, 0);
    LCD.print("Temperature: ");
    LCD.print(temperature, 1);
    LCD.print("C");

    LCD.setCursor(0, 1);
    LCD.print("Humidity: ");
    LCD.print(humidity, 1);
    LCD.print("%");
    
    LCD.setCursor(0, 2);
    LCD.print("Lux: ");
    LCD.print(ldrValue, 1);
    LCD.print("%");

    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.print("C  Humidity: ");
    Serial.print(humidity);
    Serial.println("% Light level:");
    Serial.print(humidity);

    if (temperature > 35.0) {
      
      servo.write(180);  // Set servo to 180 degrees
    } else {
      servo.write(0);  // Set servo to 0 degrees
    }

    if (humidity < 20.0 || humidity > 60.0) {
    digitalWrite(RED_LED_PIN, HIGH); // KIRMIZI LED açık
} else {
    digitalWrite(RED_LED_PIN, LOW); // KIRMIZI LED kapalı
}

    if (ldrValue < 1913) {
      digitalWrite(YELLOW_LED_PIN, LOW); // LED off
    } else {
      digitalWrite(YELLOW_LED_PIN, HIGH); // LED on
    }

    ThingSpeak.writeField(THINGSPEAK_CHANNEL_ID, 1, temperature, THINGSPEAK_API_KEY);
    ThingSpeak.writeField(THINGSPEAK_CHANNEL_ID, 2, humidity, THINGSPEAK_API_KEY);
    ThingSpeak.writeField(THINGSPEAK_CHANNEL_ID, 3, ldrValue, THINGSPEAK_API_KEY);

    lastUpdate = 200;
  }
}