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

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define DHTPIN 2     // Digital pin connected to the DHT sensor
#define DHTTYPE DHT11   // DHT 11

DHT dht(DHTPIN, DHTTYPE);
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  Serial.begin(9600);
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }
  delay(2000);
  oled.clearDisplay();
  oled.setTextSize(2);
  oled.setTextColor(WHITE);
  dht.begin();
}

void loop() {
  float humi = dht.readHumidity();
  float tempC = dht.readTemperature();

  if (isnan(humi) || isnan(tempC)) {
    oled.println("Failed");
  } else {
    oled.print("Temp: ");
    oled.print(tempC);
    oled.println(" *C");
    oled.print("Humi: ");
    oled.print(humi);
    oled.println(" %");
  }
  oled.display();
  delay(5000);
}