#include <Wire.h>
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include <DHT.h>

#define DHTPIN 21
DHT dht(DHTPIN, DHT22);

#define TFT_DC 2
#define TFT_CS 15
#define TFT_RST 4
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

float humidity, humidity2, temperature, temperature2;

void setup() {
  Serial.begin(115200);

  dht.begin();
  tft.begin();

  tft.setTextColor(ILI9341_BLACK);
  tft.fillScreen(ILI9341_BLACK);
}


void loop() {
  humidity2 = dht.readHumidity();
  temperature2 = dht.readTemperature();

  if (temperature != temperature2)
  {
    tft.fillRect(100, 120, 120, 50, ILI9341_BLACK);

    tft.setCursor(10, 120);
    tft.setTextColor(ILI9341_RED);
    tft.setTextSize(3);
    tft.println("TEMP:");
    tft.setCursor(100, 120);
    tft.println(temperature2);
    tft.setCursor(200, 120);
    tft.println("C");
  }

  if (humidity != humidity2)
  {
    tft.fillRect(100, 170, 120, 50, ILI9341_BLACK);

    tft.setCursor(10, 170);
    tft.setTextColor(ILI9341_RED);
    tft.setTextSize(3);
    tft.println("HUMI:");
    tft.setCursor(100, 170);
    tft.println(humidity2);
    tft.setCursor(200, 170);
    tft.println("%");
  }

  temperature = temperature2;
  humidity = humidity2;

  delay(500);

}