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76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
#include <stdlib.h>
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#include <time.h>
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#include <sys/time.h>
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#include "datetime.h"
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#include "settings.h"
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RTC_DATA_ATTR struct datetime_struct now;
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const char *ntpServer = "pool.ntp.org";
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unsigned long lastUpdate = 0;
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int getNumberOfDays(int month, int year)
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{
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// leap year condition, if month is 2
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if (month == 2)
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{
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if ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0))
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return 29;
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else
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return 28;
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}
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// months which has 31 days
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else if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)
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return 31;
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else
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return 30;
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}
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bool updateDateTime()
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{
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if (!getLocalTime(&now))
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{
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Serial.println("Failed to obtain time");
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return false;
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}
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//
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now.days_in_month = getNumberOfDays(now.tm_mon + 1, now.tm_year);
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now.month_num = now.tm_mon + 1;
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// gives offset of first day of the month with respect to Monday
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// https://www.tondering.dk/claus/cal/chrweek.php#calcdow
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uint8_t a = (14 - now.month_num) / 12;
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uint16_t y = (now.tm_year + 1900) - a;
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uint16_t m = now.month_num + (12 * a) - 2;
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now.day_offset = (((1 + y + (y / 4) - (y / 100) + (y / 400) + ((31 * m) / 12)) % 7) + 7) % 7;
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return true;
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}
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void setupDateTime()
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{
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// config time
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int gmtOffset_sec = NVS.getInt("system.utc");
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int daylightOffset_sec = NVS.getInt("system.dst");
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configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
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// get current time
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if (!updateDateTime())
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{
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// re-try
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updateDateTime();
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}
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Serial.println(&now, "%A, %B %d %Y %H:%M:%S");
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lastUpdate = millis();
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}
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void loopDateTime()
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{
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if ((millis() - lastUpdate) >= 1000)
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{
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lastUpdate = millis();
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updateDateTime();
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}
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} |