#include "DHT.h"
#define DHTPIN 14     // Digital pin connected to the DHT sensor
#define DHTTYPE DHT22   // DHT 11
DHT dht(DHTPIN, DHTTYPE);
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
unsigned long t , d ;
void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));
  pinMode (14,INPUT); 
  dht.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3c); //initialize I2C addr 0x3c
  display.clearDisplay(); // clears the screen and buffer
  display.drawPixel(127, 63, WHITE);
}
void loop() {
  // Wait a few seconds between measurements.
  if(millis() >= t)
  { 
    t = 2000+millis();
    // Reading temperature or humidity takes about 2000 milliseconds!
    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);
    // Check if any reads failed and exit early (to try again).
    if (isnan(h) || isnan(t) || isnan(f)) 
    {
      Serial.println(F("Failed to read from DHT sensor!"));
      return;
    }
    // Compute heat index in Celsius (isFahreheit = false)
    float hic = dht.computeHeatIndex(t, h, false);
    displayoled (t, h); 
  }
}
void displayoled (float temp, float humi) {
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0,0);
  display.print ("TEMP = ");
  display.print(String(temp));
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0,10);
  display.print("HUMI = ");
  display.print (String(humi));
  display.drawRect(0, 20, 20, 10, WHITE);
  display.drawCircle(30, 25, 4 , WHITE);
  display.drawTriangle(60,30 , 70, 20, 80, 30, WHITE);
  display.drawTriangle(80,15 , 90, 6, 100, 15, WHITE);
  display.drawTriangle(80,10 , 90, 18, 100, 10, WHITE);
  display.display();
}