/*
#include <Wire.h>
#include <TimeLib.h>
#include <DS1307RTC.h>

const char *monthName[12] = 
{
  "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

tmElements_t tm;
byte adjustt = 9;  // 修正編譯上傳的時間差 adustment for seconds lag allowing for compiler download time

void setup() 
{

  bool parse=false;
  bool config=false;
  // get the date and time the compiler was run

  if (getDate(__DATE__) && getTime(__TIME__)) 
  {

    parse = true;
    // and configure the RTC with this info
    if (RTC.write(tm)) 
    {
      config = true;
    }

  }
  Serial.begin(9600);
  if (parse && config) 
  {

    Serial.print("DS1307 configured Time=");
    Serial.print(__TIME__);
    Serial.print(", Date=");
    Serial.println(__DATE__);

  } 
  else if (parse) 
  {

    Serial.println("DS1307 Communication Error :-{");
    Serial.println("Please check your circuitry");

  } 
  else 
  {
    Serial.print("Could not parse info from the compiler, Time=\"");
    Serial.print(__TIME__);
    Serial.print("\", Date=\"");
    Serial.print(__DATE__);
    Serial.println("\"");
  }

}

void loop() 
{
}

bool getTime(const char *str)
{
  int Hour, Min, Sec;
  if (sscanf(str, "%d:%d:%d", &Hour, &Min, &Sec) != 3) return false;
  tm.Hour = Hour;
  tm.Minute = Min;
  tm.Second = Sec + adjustt;
  return true;
}

bool getDate(const char *str)
{
  char Month[12];
  int Day, Year;
  uint8_t monthIndex;
  if (sscanf(str, "%s %d %d", Month, &Day, &Year) != 3) return false;
  for (monthIndex = 0; monthIndex < 12; monthIndex++) 
  {
    if (strcmp(Month, monthName[monthIndex]) == 0) break;
  }

  if (monthIndex >= 12) return false;
  tm.Day = Day;
  tm.Month = monthIndex + 1;
  tm.Year = CalendarYrToTm(Year);
  return true;
}
*/



#include <Wire.h>
#include <TimeLib.h>
#include <DS1307RTC.h>
tmElements_t tm;
void setup() 
{
  Serial.begin(9600);
  while (!Serial) ; // 等待 Serial 可用
  Serial.println("Send the current time as 'YYYY-MM-DD HH:MM:SS' to set RTC.");
}
void loop() 
{
  if (Serial.available()) 
  {
    String input = Serial.readStringUntil('\n'); // 接收直到換行符
    if (parseDateTime(input)) 
    {
      if (RTC.write(tm)) 
      {
        Serial.println("RTC updated successfully!");
      } 
      else 
      {
        Serial.println("Failed to write to RTC.");
      }
    } 
    else 
    {
      Serial.println("Invalid input. Use 'YYYY-MM-DD HH:MM:SS' format.");
    }
  }
}
bool parseDateTime(String input) 
{
  int year, month, day, hour, minute, second;
  if (sscanf(input.c_str(), "%d-%d-%d %d:%d:%d", &year, &month, &day, &hour, &minute, &second) == 6) 
  {
    tm.Year = CalendarYrToTm(year);
    tm.Month = month;
    tm.Day = day;
    tm.Hour = hour;
    tm.Minute = minute;
    tm.Second = second;
    return true;
  }
  return false;
}