#include <DHT.h>
#include <Adafruit_SSD1306.h> // Нормальная (надеюсь) библиотека для дисплея
#include <Fonts/Org_01.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
#define DHTPIN 3

DHT dht(DHTPIN, DHTTYPE);

// 'heart17x16_small', 17x16px
const unsigned char epd_bitmap_heart17x16_small [] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c,
  0x1c, 0x00, 0x3e, 0x3e, 0x00, 0x3f, 0xfe, 0x00, 0x1f, 0xfc, 0x00, 0x0f, 0xf8, 0x00, 0x07, 0xf0,
  0x00, 0x03, 0xe0, 0x00, 0x01, 0xc0, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
// 'heart17x16_big', 17x16px
const unsigned char epd_bitmap_heart17x16_big [] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x1e, 0x00, 0x7e, 0x3f, 0x00, 0xff,
  0xff, 0x80, 0xff, 0xff, 0x80, 0xff, 0xff, 0x80, 0x7f, 0xff, 0x00, 0x3f, 0xfe, 0x00, 0x1f, 0xfc,
  0x00, 0x0f, 0xf8, 0x00, 0x07, 0xf0, 0x00, 0x03, 0xe0, 0x00, 0x01, 0xc0, 0x00, 0x00, 0x80, 0x00
};

const uint8_t img_therm[16] PROGMEM = {
  0b00100000,
  0b01110000,
  0b01010000,
  0b01011000,
  0b01010000,
  0b01011000,
  0b01010000,
  0b01011000,
  0b01010000,
  0b01011000,
  0b01010000,
  0b01011000,
  0b01010000,
  0b10001000,
  0b10001000,
  0b01110000,
};


void setup () {
  display.begin(SSD1306_SWITCHCAPVCC, 0x3D); // Инициализация дисплея (0x3C - его адресс)
  display.display(); // неоходимо вызывать каждый раз для обновления дисплея
  display.clearDisplay();
  dht.begin();
  display.setTextSize(1);
  // display.setFont(&Org_01);
  display.setTextColor(WHITE, BLACK);

}

void heartBeat() {
  static uint64_t previousMillis;
  static bool smallHeart = false;
  if (millis() - previousMillis >= 300) {
    previousMillis = millis();
    smallHeart = !smallHeart;
  }
  if (smallHeart) {
    display.drawBitmap(56, 40, epd_bitmap_heart17x16_small, 17, 16, SSD1306_WHITE);
  }
  else {
    display.drawBitmap(56, 40, epd_bitmap_heart17x16_big, 17, 16, SSD1306_WHITE);
  }

}

void loop () {
  static uint64_t previousMillis; 
  float t = dht.readTemperature(); 
  float h = dht.readHumidity();
  if (millis() - previousMillis >= 2000) {  // Самый простой и правильный с точки зрения
    previousMillis = millis();              // работы МК таймер на 2 секунды
    // Read temperature as Celsius (the default)
    t = dht.readTemperature();
    h = dht.readHumidity();
  }

  display.drawBitmap(5,2, img_therm, 5, 16, SSD1306_WHITE);
  display.setTextSize(1);
  display.setCursor(17, 3);
  display.print("Temperature: " + String(t));

  display.setCursor(17, 12);
  display.print("Humidity: " + String(h) + " %");

  display.setFont(&Org_01);
  display.setCursor(0,32);
  display.print("Stay safe & drink water");
  display.setFont();

  heartBeat();

  display.display(); 
  display.clearDisplay();


}