#include <WiFi.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Servo.h>
#include <BlynkSimpleEsp32.h>


#define BLYNK_TEMPLATE_ID "TMPL6TGZ09pEx"
#define BLYNK_TEMPLATE_NAME "RainaldiBlynk"

#include <Blynk/BlynkApi.h>
// DHT22 sensor settings
#define DHTPIN 14
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// OLED display settings
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// LED settings
#define LED1 19 // Cooling fan indicator
#define LED2 16 // Heating lamp indicator

// Servo settings
Servo servo;
#define SERVOPIN 26
bool servoMoved = false; // to track if the servo moved for low temperature

// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Blynk authorization token
char auth[] = "_8TFzo-c31MZXQal_7-cLCoPw6mPr168";

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  
  // Initialize DHT22 sensor
  dht.begin();
  
  // Initialize OLED display
  if(!display.begin(SSD1306_I2C_ADDRESS, OLED_RESET)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  display.display();
  delay(2000);
  display.clearDisplay();
  
  // Initialize LEDs
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);

  // Initialize Servo motor
  servo.attach(SERVOPIN);
  servo.write(0);

  // Initialize WiFi
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Initialize Blynk
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  Blynk.run();
  
  // Read DHT22 sensor
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  
  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  
  // Display temperature and humidity on OLED
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.print("Temp: ");
  display.print(t);
  display.println(" *C");
  display.print("Humidity: ");
  display.print(h);
  display.println(" %");
  
  // Control LEDs, servo motor, and display messages based on temperature
  if (t > 30) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, LOW);
    display.setCursor(0, 20);
    display.println("Kipas Menyala");
    Blynk.notify("Kipas Menyala");
    servo.write(90); // Rotate the servo
    servoMoved = false; // Reset the flag for low temperature movement
  } else if (t < 25) {
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, HIGH);
    display.setCursor(0, 20);
    display.println("Lampu Penghangat Menyala");
    Blynk.notify("Lampu Penghangat Menyala");
    if (!servoMoved) {
      servo.write(0); // Move the servo once
      servoMoved = true; // Set the flag to prevent multiple movements
    }
  } else {
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
    servo.write(0); // Reset servo to initial position
    servoMoved = false; // Reset the flag
  }
  
  display.display();
  
  delay(2000); // Wait for 2 seconds before the next loop
}