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

# define DHT_pin 19
DHT dht(DHT_pin,DHT22);

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_reset -1
//to create disply object 
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_reset);


void setup() {

  Serial.begin(115200);
  dht.begin();
  if(!oled.begin(SSD1306_SWITCHCAPVCC,0x3C)){
    Serial.println("oled failure");
  } 
  oled.clearDisplay();
  oled.setTextSize(1);
  oled.setTextColor(SSD1306_WHITE);
  oled.setCursor(0,0);
  oled.print("works");
  oled.display();
  delay(1000);

}

void loop() {
  oled.clearDisplay();
  
  float humid=dht.readHumidity();
  float temp=dht.readTemperature();
  if (isnan(humid)||isnan(temp)){
    oled.setCursor(0,0);
    oled.println("dht failure");
    //println prints the text at the same line as that of cursor then it moves the curor down
  }
  else{
    oled.setCursor(0,0);
    oled.print(humid);
    oled.println("%");
    oled.println(temp);
    delay(1000);
    
  }
  oled.display();
  delay(1000);

}