// /0979/nano_RTC/nano_RTC.ino	Update: 2024/01/24	10:42
//Module: Arduino Nano
//
#include <Wire.h>
#include "RTClib.h"

RTC_DS1307 rtc;//RTC_DS3231

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

void setup () {
  Serial.begin(115200);
   delay(50); 
  if (! rtc.begin()) {
    while (1);
  }
// 　rtc.adjust(DateTime(2024, 13, 28, 12, 24, 0)); //時刻設定
  
}
void loop () {
    DateTime now = rtc.now();
    
    Serial.print(now.year(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.day(), DEC);
    Serial.print(" (");
    Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
    Serial.print(") ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);   
    Serial.println();
    delay(1000);
}