#include <Wire.h>
#include <RTClib.h>
#include "DHT.h"
#include "U8glib.h"
////////////////////////////////////////////
U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NONE);  // I2C / TWI


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

RTC_DS3231 rtc;
String timee;
String dayyy;
String tem;
#define DHTPIN 2
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);


const int MPU = 0x69;
int16_t Tmp, GyX, GyY, GyZ;
///////////////////////////////////////////////

void setup() {
  ////////////////////////////////////////////////////// for OLED u8g library ↓
  // flip screen, if required
  // u8g.setRot180();

  // assign default color value
  if ( u8g.getMode() == U8G_MODE_R3G3B2 ) {
    u8g.setColorIndex(255);     // white
  }
  else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) {
    u8g.setColorIndex(3);         // max intensity
  }
  else if ( u8g.getMode() == U8G_MODE_BW ) {
    u8g.setColorIndex(1);         // pixel on
  }
  else if ( u8g.getMode() == U8G_MODE_HICOLOR ) {
    u8g.setHiColorByRGB(255, 255, 255);
  }
  pinMode(8, OUTPUT);
  ////////////////////////////////////////////////////// for OLED u8g library ↑
  Serial.begin(9600);
  dht.begin();
  initRTC();
  Wire.begin();
  Wire.beginTransmission(MPU);
  Wire.write(0x6B);
  Wire.write(0);
  Wire.endTransmission(true);
}

/////////////////////////////////////////
void loop() {
  Gyroscope();
  DateTime now = rtc.now();
  float t = dht.readTemperature();
  timee = "";
  timee += now.hour();
  timee += ':';
  timee += now.minute();
  timee += ':';
  timee += now.second();
  dayyy = "";
  dayyy += (now.year());
  dayyy += '/';
  dayyy += (now.month());
  dayyy += '/';
  dayyy += (now.day());
  tem =  t ;
  Serial.println(timee);
  Serial.println(dayyy);
  Serial.println(tem);



  if (  GyX > 2000 && GyX < 13000 ) {
    u8g.firstPage();
    do {
      u8g.setColorIndex(1);
      draw(timee, dayyy, tem, 30, 22);
    } while ( u8g.nextPage() );
    // rebuild the picture after some delay
    delay(50);
  }
  else {
    u8g.firstPage();
    do {
      u8g.setColorIndex(0);
      u8g.drawBox(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT); // Draw a filled rectangle covering the entire screen
    } while (u8g.nextPage());
    delay(50);
  }

}


void initRTC() {
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }

  if (rtc.lostPower()) {
    Serial.println("RTC lost power, let's set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}

void Gyroscope() {
  Wire.beginTransmission(MPU);
  Wire.write(0x3B);
  Wire.endTransmission(false);
  Wire.requestFrom(MPU, 12, true);
  GyX = Wire.read() << 8 | Wire.read();
  GyY = Wire.read() << 8 | Wire.read();
  GyZ = Wire.read() << 8 | Wire.read();
  Serial.print("Gyroscope: ");
  Serial.print("X = "); Serial.print(GyX);
  Serial.print(" | Y = "); Serial.print(GyY);
  Serial.print(" | Z = "); Serial.println(GyZ);
  Serial.println(" ");
  delay(333);
}

void draw(String T1, String T2, String T3, int x, int y) {
  // graphic commands to redraw the complete screen should be placed here
  u8g.setFont(u8g_font_unifont);
  //u8g.setFont(u8g_font_osb21);
  u8g.setPrintPos(x, y);
  u8g.print(T1);
  u8g.setPrintPos(x, y + 20);
  u8g.print(T2);
  u8g.setPrintPos(x, y + 40);
  u8g.print(T3);
}