#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DHT.h>
#define type DHT22
#define pin 7

// Canvas size
const int a = 128;
const int b = 64;
const int reset = -1;
// Create display
DHT dht(type,pin);
Adafruit_SSD1306 display(a, b, &Wire, reset);

void setup() {
  Serial.begin(115200);
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("SSD1306 allocation failed");
    for (;;)
      ;  // Don't proceed, loop forever
  }
  display.display();
  dht.begin();
  delay(500);
  display.clearDisplay();
  delay(200);
}
void display_text(String text, int x, int y) {
  display.setTextSize(1);       // Normal 1:1 pixel scale
  display.setTextColor(WHITE);  // Draw white text
  display.setCursor(x, y);      // Start at top-left corner
  display.println(text);
  display.display();
  display.clearDisplay();
}
void loop() {
  float T =dht.readTemperature();
  float H =dht.readHumidity();
  if(isnan(T) || isnan(H)){
    display_text("Error getting data!!!",0,0);
    }
  else{
    display_text("DHT22 data:",0,0);
    display_text("Temperature:"+String(T)+"c",0,15);
    display_text("Humidity:"+String(H)+"%",0,30);
    }
}