// /0979/nano_TM1637_RTC/nano_TM1637_RTC.ino	Update: 2024/01/24	10:44
//Board: Arduino Nano
//
#include <Wire.h>
#include "RTClib.h"
#include "time.h"
#include <TM1637Display.h>

#define RTC_CLK 5 // RTC SCL は A5(SCL)
#define RTC_DIO 4 // RTC SDA は A4(SDA)
//                   RTC DS  は 未接続

#define PIN_CLK 13  // TM1637D CLK は D13(SCK)
#define PIN_DIO 12  // TM1637D DIO は D12(MISO)

struct tm timeinfo;
static bool cFLG=true;
unsigned int ntime;

TM1637Display display( PIN_CLK, PIN_DIO );

RTC_DS1307 rtc;

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

void setup () {
  Serial.begin(115200);
   delay(50); 
  display.setBrightness(0x0f);

  if (! rtc.begin()) {
    while (1);
  }
//  rtc.adjust(DateTime(2020, 2, 2, 2, 2, 0)); //時刻設定する時だけ　uncomment
  
}
void loop () {
  DateTime now = rtc.now();
    
//    getLocalTime(&timeinfo);
//  ntime = timeinfo.tm_hour * 100 + timeinfo.tm_min;
  ntime = now.hour() * 100 + now.minute();
  if ( cFLG == true ) display.showNumberDecEx(ntime, 0x40, true);
  else if ( cFLG == false ) display.showNumberDecEx(ntime, 0x0, true);
  cFLG = !cFLG;

    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);
}