#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <DHT.h>

// DHT11 settings
#define DHTPIN 2
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

// I2C LCD settings
LiquidCrystal_I2C lcd(0x27, 16, 2); // Change 0x27 to your LCD's I2C address

// OLED display settings
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 32
#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3C
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Initialize DHT11 sensor
  dht.begin();

  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("DHT11 Sensor");

  // Initialize OLED
   if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  display.display();
  delay(2000);
  display.clearDisplay();
}

void loop() {
  // Read temperature and humidity from DHT11
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Check if any reads failed
  if (isnan(humidity) || isnan(temperature)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Display temperature and humidity on LCD
  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C ");
  lcd.setCursor(9, 1);
  lcd.print("Hum: ");
  lcd.print(humidity);
  lcd.print(" %");

  // Display time on OLED
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.print("Time: ");
  display.print(hour());
  display.print(":");
  display.print(minute());
  display.print(":");
  display.print(second());
  display.display();

  // Delay between updates
  delay(2000);
}