Arduino ESP32 Clock

【实例简介】从网络获取时间，用ESP32内置RTC制作的时钟
【实例截图】

【核心代码】

timeinfo=rtc.getTimeStruct();

  //byte xcolon;
  bool Lflag = false;
  if(showDay)
  {
    screen.drawRect(0,0,240,240,TFT_RED);
  }
  if(targetTime<millis())
  {
    targetTime = millis() 1000;
    if((timeinfo.tm_hour>=0)&&(timeinfo.tm_hour<6)) Lflag = true;
    //Serial.println(rtc.getTime("%a, %D %H:%M:%S"));
    String Hour   = String(timeinfo.tm_hour/10) String(timeinfo.tm_hour%10); /* 时 - 取值区间为[0,23] */
    String Minute = String(timeinfo.tm_min/10)  String(timeinfo.tm_min%10);  /* 分 - 取值区间为[0,59] */
    String Second = String(timeinfo.tm_sec/10)  String(timeinfo.tm_sec%10);  /* 秒 – 取值区间为[0,59] */
    byte xpos=12;byte ypos=62;
    screen.setTextColor(0xFBE0, TFT_BLACK); // Orange
    xpos = screen.drawChar(Hour[0],xpos,ypos,7);
    xpos = screen.drawChar(Hour[1],xpos,ypos,7);
    xpos = screen.drawChar(':',xpos,ypos,7);
    xpos = screen.drawChar(Minute[0],xpos,ypos,7);
    xpos = screen.drawChar(Minute[1],xpos,ypos,7); 
    //xcolon = xpos;
    xpos = screen.drawChar(':',xpos,ypos,7);
    xpos = screen.drawChar(Second[0],xpos,ypos,7);
    xpos = screen.drawChar(Second[1],xpos,ypos,7);
    //
    if((showDay==true)||(timeinfo.tm_mday!=tian))
    {
      tian = timeinfo.tm_mday;calibratio=true;
      byte xpos=8, ypos=17;
      String Year  = String(timeinfo.tm_year 1900);// 年份，其值等于实际年份减去1900 
      //月份（从一月开始，0代表一月） - 取值区间为[0,11] 
      String Month = String((timeinfo.tm_mon 1)/10) String((timeinfo.tm_mon 1)%10); 
      String Day   = String(timeinfo.tm_mday/10) String(timeinfo.tm_mday%10);// 一个月中的日期 - 取值区间为[1,31] 
  
      screen.fillRect(xpos,ypos,32*7,35,TFT_BLACK);
      xpos=screen.drawNum(xpos,ypos,&Year[0],TFT_BLUE);
      xpos=screen.drawNum(xpos,ypos,&Year[1],TFT_BLUE);
      xpos=screen.drawNum(xpos,ypos,&Year[2],TFT_BLUE);
      xpos=screen.drawNum(xpos,ypos,&Year[3],TFT_BLUE);
      xpos=screen.drawHanzi(xpos,ypos,"年",TFT_BLUE);
      xpos=screen.drawNum(xpos,ypos,&Month[0],TFT_BLUE);
      xpos=screen.drawNum(xpos,ypos,&Month[1],TFT_BLUE);
      xpos=screen.drawHanzi(xpos,ypos,"月",TFT_BLUE);
      xpos=screen.drawNum(xpos,ypos,&Day[0],TFT_BLUE);
      xpos=screen.drawNum(xpos,ypos,&Day[1],TFT_BLUE);
      xpos=screen.drawHanzi(xpos,ypos,"日",TFT_BLUE);
  
      LDate L=g2n.GL2NL(timeinfo.tm_year 1900,timeinfo.tm_mon 1,timeinfo.tm_mday);
      if(L.Success)
      {
        xpos=56;ypos=122;
        screen.fillRect(1,ypos,238,239-ypos,TFT_BLACK);
        xpos=screen.drawHanzi(xpos,ypos,Tiangan[L.Tiangan-1][0],TFT_BLUE);
        xpos=screen.drawHanzi(xpos,ypos,Dizhi[L.Dizhi-1][0],TFT_BLUE);
        xpos=screen.drawHanzi(xpos,ypos,Dizhi[L.Dizhi-1][1],TFT_BLUE);
        xpos=screen.drawHanzi(xpos,ypos,"年",TFT_BLUE);
        
        ypos=165-8;
        if(L.LeapMonth)
        {
          xpos=screen.drawHanzi(8,ypos,"闰",TFT_BLUE);
        }
        else
        {
          xpos=8 16;
        }
        xpos=screen.drawHanzi(xpos,ypos,Yueming[L.LMonth-1][0],TFT_BLUE);
        xpos=screen.drawHanzi(xpos,ypos,"月",TFT_BLUE);
        xpos=screen.drawNum(xpos,ypos,"(",TFT_BLUE);
        xpos=screen.drawHanzi(xpos,ypos,Xingqi[L.BigMonth 9][0],TFT_BLUE);
        xpos=screen.drawNum(xpos,ypos,")",TFT_BLUE);
        xpos=screen.drawHanzi(xpos,ypos,Riming[L.LDay-1][0],TFT_BLUE);
        xpos=screen.drawHanzi(xpos,ypos,Riming[L.LDay-1][1],TFT_BLUE);
        
        xpos=24;ypos=200-8;
        xpos=screen.drawHanzi(xpos,ypos,Jieqi[L.JieQi-1][0],TFT_BLUE);
        xpos=screen.drawHanzi(xpos,ypos,Jieqi[L.JieQi-1][1],TFT_BLUE);
        xpos =64;
        xpos=screen.drawHanzi(xpos,ypos,"周",TFT_BLUE);/*星期 – 取值区间为[0,6]，其中0代表星期天，1代表星期一，以此类推*/
        xpos=screen.drawHanzi(xpos,ypos,Xingqi[timeinfo.tm_wday][0],TFT_BLUE);
      }
    }
  }