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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define DHT_PIN 2 // Connect DHT22 data pin to Arduino digital pin 2
#define DHT_TYPE DHT22 // Set the DHT type to DHT22

DHT dht(DHT_PIN, DHT_TYPE);

void setup() {
  Serial.begin(9600);

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }

  dht.begin();

  // Display initial screen
  updateDisplay();

  // Show temperature and humidity in a loop
  while (true) {
    updateDisplay();
    delay(5000); // Update display every 5 seconds
  }
}

void loop() {
  // Nothing to do here, everything is handled in setup()
}

void updateDisplay() {
  display.clearDisplay();
  display.setTextColor(SSD1306_WHITE);
  display.setTextSize(1);
  display.setFont(NULL);
  display.setCursor(25, 0);
  display.println("Weather Data");
  
  // Read temperature and humidity from DHT22 sensor
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  // Display temperature
  display.setCursor(0, 15);
  display.print("Temperature:");
  display.setCursor(71, 15);
  display.print(temperature, 0); // Display temperature without decimal
  
  // Display humidity
  display.setCursor(0, 30);
  display.print("Humidity:");
  display.setCursor(53, 30);
  display.print(humidity, 0); // Display humidity without decimal
  
  // Draw separator lines
  display.drawLine(0, 10, 128, 10, SSD1306_WHITE);
  display.drawLine(0, 40, 128, 40, SSD1306_WHITE);
  
  // Update display
  display.display();
}