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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define SCREEN_ADDRESS 0x3C
#define SSD1306_I2C_ADDRESS 0x3C

#define DHT_PIN 4       // DHT22 sensor pin
#define DHT_TYPE DHT22   // DHT sensor type

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, SCREEN_ADDRESS);
DHT dht(DHT_PIN, DHT_TYPE);

void setup() {
  Serial.begin(115200);

 if(!display.begin(SSD1306_I2C_ADDRESS, SCREEN_ADDRESS)) {
  Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  delay(2000);

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(10, 10);
  display.println("ESP32 + DHT22 + SSD1306");
  display.display();

  dht.begin();
}

void loop() {
  delay(2000);

  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(10, 20);
  display.print("Temp: ");
  display.print(temperature);
  display.println(" C");

  display.setCursor(10, 40);
  display.print("Hum: ");
  display.print(humidity);
  display.println(" %");

  display.display();

  Serial.println("------------------------");
}