#include <Wire.h>
#include <Adafruit_GFX.h>
#include <U8g2lib.h>
#include <Adafruit_SSD1306.h>
#include "RTClib.h"
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

#include "DHTesp.h"

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


const int DHT_PIN = 25;
DHTesp dhtSensor;

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
RTC_DS1307 RTC;
char days[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

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

  if (!RTC.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);

  }
  RTC.adjust(DateTime(F(__DATE__), F(__TIME__)));

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  delay(1000);
  display.clearDisplay();

  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(30, 20);
  // Display static text
  display.println("RTC");
  display.display();
  delay(1000);
  display.clearDisplay();

   Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
   u8g2.begin();
}

int t,f;

void loop() {
  DateTime now = RTC.now();

  display.clearDisplay();
  display.setTextSize(1);
  display.setCursor(0, 0);
  display.print(now.day());
  display.print('/');
  display.print(now.month());
  display.print('/');
  display.print(now.year());
  display.println(days[now.dayOfTheWeek()]);
  display.println(' ');
  display.setCursor(0, 40);
  if (now.hour() < 10)
    display.print('0');
  display.print(now.hour());
  display.print(':');
  if (now.minute() < 10)
    display.print('0');
  display.print(now.minute());
  display.print(':');
  if (now.second() < 10)
    display.print('0');
    
  display.println(now.second());
  display.display();
 delay(5000);
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  t= data.temperature;
  f=data.humidity;

  Serial.println("Temp: " + String(t) + "°C");
  Serial.println("Humidity: " + String(f) + "%");
  Serial.println("---");
  
  u8g2.clearBuffer();					// clear the internal memory
  u8g2.setFont(u8g2_font_ncenB08_tr);	// choose a suitable font
  u8g2.drawStr(15, 10, "3OK  Project");	// write something to the internal memory
  u8g2.drawStr(5, 30, "t=");
  u8g2.setCursor(25, 30);  u8g2.print(t);
 u8g2.drawStr(45, 30, "f=");
  u8g2.setCursor(55, 30);  u8g2.print(f);
  u8g2.sendBuffer();				
   
  delay(1000);

}