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

#define DHTPIN 4
#define DHTTYPE DHT11

#define SCREEN_WIDTH 128 // OLED Breite in Pixel
#define SCREEN_HEIGHT 64 // OLED Höhe in Pixels

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

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

  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("problem das SSD1306 OLED zu starten"));
    while (1);
  }

  oled.setTextSize(1);
  oled.setTextColor(WHITE);
  oled.setCursor(0, 0); 
  oled.clearDisplay();  
  oled.display();      
  delay(2000);
}

void loop() {
  delay(2000);

  float h = dht.readHumidity();
  float t = dht.readTemperature();

  if (isnan(h) || isnan(t)) {
    Serial.println("Kein Signal von Sensor!");
    oled.setCursor(0, 0); 
    oled.clearDisplay();
    oled.println("Error");
    oled.display();
    return;
  }

  float hic = dht.computeHeatIndex(t, h, false);

  oled.clearDisplay();
  oled.setCursor(0, 0); 
  oled.println("Luftfeuchtigkeit: ");
  oled.println(h);
  oled.println("%  Temperatur : ");
  oled.println(t);
  oled.println("°C ");
  oled.display();
}