#include <DHT.h>
#include <Servo.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1
#define DHTPIN 2     // Digital pin connected to the DHT sensor
#define DHTTYPE DHT22   // DHT 22 (AM2302)
#define SERVO_PIN 9   // Digital pin connected to the servo

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
DHT dht(DHTPIN, DHTTYPE);
Servo servo;


void setup() {
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  // Clear the buffer
  display.clearDisplay();

  // Set text size, color, and display text
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  Serial.begin(9600);
  dht.begin();
  servo.attach(SERVO_PIN);
}

void loop() {
  // Read temperature in Celsius
  float temperatureC = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if any reads failed
  if (isnan(temperatureC)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  Serial.print("Temperature: ");
  Serial.print(temperatureC);
  Serial.print(" °C\t");
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");
  // Check temperature conditions and control servo
  if (temperatureC >= 16) {
    // Turn on servo
    servo.write(90); 
    Serial.println("Servo turned on");
  } else if (temperatureC <= 21) {
    // Turn off servo
    servo.write(0);  
    Serial.println("Servo turned off");
  }

  delay(500); 
}