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

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

#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

void setup() {
  // put your setup code here, to run once:
  Wire.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);

  dht.begin();
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(2000);

  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Clear the display
  display.clearDisplay();
  //Set the color - always use white despite actual display color
  display.setTextColor(WHITE);
  //Set the font size
  display.setTextSize(1);
  //Set the cursor coordinates
  display.setCursor(0,0);
  display.print("DHT22");
  display.setCursor(0,10);
  if (isnan(h) || isnan(t) || isnan(f)) {
    // Serial.println(F("Failed to read from DHT sensor!"));
    display.print("Failed to read from DHT sensor!");
  }
  else{
    display.print("Humidity: "); 
    display.print(h);
    display.print(" %");
    display.setCursor(0,20);
    display.print("Temp: "); 
    display.print(t);
    display.print("C ");
    display.print(f);
    display.print("F");
  }
  display.display();
  digitalWrite(13, HIGH);
  delay(50);
  digitalWrite(13, LOW);
}