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

// OLED
#define OLED_WIDTH 128
#define OLED_HEIGHT 64
#define OLED_ADDR   0x3C


// DHT 22
#define DHTPIN 15     // DHT PIN 2
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);
Adafruit_SSD1306 display(OLED_WIDTH, OLED_HEIGHT, & Wire, -1);


void setup() {
  Serial.begin(9600);
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("failed to start SSD1306 DISPLAY"));
    while (1);}
  delay(1000);  
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(0, 2);

  display.display();

  dht.begin();
}
void loop() {
  float c = dht.readTemperature();// Read temperature (default in celcius)
  float h = dht.readHumidity();// Read humidity percentage 
  float f, k;
	 f = 1.8 * c + 32.0;
	 k = 273.15 + c;

// Check if any reads failed and exit early (to try again).
  if (isnan(c) || isnan(h)) {
    Serial.println("Failed to read from DHT sensor!"); //Could have connected wrong pin
    return;
  }
  // Show output in IDE
  Serial.println("+-------------------------------+");
  Serial.println("|      ENVIRONTMENT STATUS      |");
  Serial.println("| Temp in celcius     : "+String(c)+"°C |");
  Serial.println("| Temp in farenheit   : "+String(f)+"°C |");
  Serial.println("| Temp in kelvin      : "+String(k)+"K |");
  Serial.println("| Humidity            : "+String(h)+"%  |");
  Serial.println("+-------------------------------+");
  Serial.println("-@-");
  // Show output in OLED
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(0, 2);
  display.println("Temp : "+String(c)+"°C | "+String(f)+"°F |"+String(k)+" K");
  display.print("Humidity : "+String(h)+"%");
  display.display();

  
  delay(10000);
}