#include <DHT.h>
#include <Servo.h>

#define DHTPIN 9 // Define the pin connected to the DHT sensor
#define DHTTYPE DHT22 // DHT 22 sensor type
#define SERVO_PIN 5 // Define the pin connected to the servo motor

DHT dht(DHTPIN, DHTTYPE); // Initialize DHT sensor
Servo myservo; // Initialize servo motor
int targetAngle = 0; // Initial Angle

void setup() {
  Serial.begin(9600);
  Serial.println(F("Smart_fan test!"));

  dht.begin();
  myservo.attach(SERVO_PIN); // Attach the servo to the specified pin
  myservo.write(targetAngle); // servo motor initial position
}

void loop() {

  // Wait a few seconds between measurements.
  delay(5000);

  // Sensor reads humidity
  float h = dht.readHumidity();
  // Read temperature as Celsius
  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;
  }

  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);

  int currentAngle = myservo.read(); // Get current servo position

  // Temperature:
  // Comfort zone: 25-30°C (77-86°F)
  // Coastal regions: Average highs around 30-32°C (86-90°F)
  // Highlands: Average highs around 15-18°C (59-64°F)
  // Humidity:
  // Generally: 60-90% (can vary significantly)
  // Coastal areas: Higher humidity, often exceeding 70% year-round.
  // Highlands: Lower humidity, especially during the dry season (can drop to 60%).

  if (h >= 40.0 && t >= 20.0) {
    Serial.println("Environment is Hot!");
    // Set target angle to 90 degrees if the condition is true
    targetAngle = 90;

    // Move the servo towards the target angle smoothly
    for (int i = currentAngle; i <= targetAngle; i++) {
      myservo.write(i);
      delay(10); // Adjust delay for desired speed
    }
  } else {
    targetAngle = 0; // Set target angle back to 0 degrees otherwise
    delay(5000*60); // cool down time for the tool
  }

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.println();
}