#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 "SX9MOXHZLJASIDHW"
#define THINGSPEAK_CHANNEL_ID 2391807
#define LED_PIN 27       // GPIO pin for the LED
#define BLUE_LED_PIN 26  // GPIO pin for the blue LED

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
DHT dht(14, DHT22);
Servo servo;  // Use Servo library

const long updateInterval = 1 * 1000;  // Update ThingSpeak every 5 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(LED_PIN, OUTPUT);
  pinMode(BLUE_LED_PIN, OUTPUT);

  dht.begin();
  servo.attach(12);  // Attach servo to pin 12

  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    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();

    if (isnan(humidity) || isnan(temperature)) {
      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("%");

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

    if (temperature >= 38.0 && temperature <= 42.0 && humidity >= 55.0 && humidity <= 60.0) {
      digitalWrite(LED_PIN, LOW); // LED off
    } else {
      digitalWrite(LED_PIN, HIGH); // LED on
    }

    if (temperature < 38.0) {
      digitalWrite(BLUE_LED_PIN, HIGH); // Blue LED on
    } else {
      digitalWrite(BLUE_LED_PIN, LOW); // Blue LED off
    }

    if (humidity > 60.0) {
      servo.write(180);  // Set servo to 180 degrees
    } else {
      servo.write(90);  // Set servo to 90 degrees
    }

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

    lastUpdate = 200;
  }
}