112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
// Simple date conversions and calculations
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#include <Wire.h>
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#include "RTClib.h"
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#if defined(ARDUINO_ARCH_SAMD)
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// for Zero, output on USB Serial console, remove line below if using programming port to program the Zero!
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#define Serial SerialUSB
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#endif
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void showDate(const char* txt, const DateTime& dt) {
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Serial.print(txt);
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Serial.print(' ');
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Serial.print(dt.year(), DEC);
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Serial.print('/');
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Serial.print(dt.month(), DEC);
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Serial.print('/');
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Serial.print(dt.day(), DEC);
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Serial.print(' ');
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Serial.print(dt.hour(), DEC);
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Serial.print(':');
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Serial.print(dt.minute(), DEC);
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Serial.print(':');
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Serial.print(dt.second(), DEC);
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Serial.print(" = ");
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Serial.print(dt.unixtime());
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Serial.print("s / ");
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Serial.print(dt.unixtime() / 86400L);
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Serial.print("d since 1970");
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Serial.println();
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}
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void showTimeSpan(const char* txt, const TimeSpan& ts) {
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Serial.print(txt);
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Serial.print(" ");
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Serial.print(ts.days(), DEC);
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Serial.print(" days ");
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Serial.print(ts.hours(), DEC);
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Serial.print(" hours ");
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Serial.print(ts.minutes(), DEC);
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Serial.print(" minutes ");
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Serial.print(ts.seconds(), DEC);
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Serial.print(" seconds (");
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Serial.print(ts.totalseconds(), DEC);
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Serial.print(" total seconds)");
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Serial.println();
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}
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void setup () {
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#ifndef ESP8266
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while (!Serial); // for Leonardo/Micro/Zero
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#endif
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Serial.begin(57600);
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DateTime dt0 (0, 1, 1, 0, 0, 0);
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showDate("dt0", dt0);
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DateTime dt1 (1, 1, 1, 0, 0, 0);
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showDate("dt1", dt1);
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DateTime dt2 (2009, 1, 1, 0, 0, 0);
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showDate("dt2", dt2);
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DateTime dt3 (2009, 1, 2, 0, 0, 0);
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showDate("dt3", dt3);
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DateTime dt4 (2009, 1, 27, 0, 0, 0);
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showDate("dt4", dt4);
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DateTime dt5 (2009, 2, 27, 0, 0, 0);
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showDate("dt5", dt5);
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DateTime dt6 (2009, 12, 27, 0, 0, 0);
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showDate("dt6", dt6);
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DateTime dt7 (dt6.unixtime() + 3600); // One hour later.
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showDate("dt7", dt7);
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DateTime dt75 = dt6 + TimeSpan(0, 1, 0, 0); // One hour later with TimeSpan addition.
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showDate("dt7.5", dt75);
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DateTime dt8 (dt6.unixtime() + 86400L); // One day later.
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showDate("dt8", dt8);
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DateTime dt85 = dt6 + TimeSpan(1, 0, 0, 0); // One day later with TimeSpan addition.
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showDate("dt8.5", dt85);
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DateTime dt9 (dt6.unixtime() + 7 * 86400L); // One week later.
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showDate("dt9", dt9);
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DateTime dt95 = dt6 + TimeSpan(7, 0, 0, 0); // One week later with TimeSpan addition.
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showDate("dt9.5", dt95);
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DateTime dt10 = dt6 + TimeSpan(0, 0, 42, 42); // Fourty two minutes and fourty two seconds later.
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showDate("dt10", dt10);
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DateTime dt11 = dt6 - TimeSpan(7, 0, 0, 0); // One week ago.
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showDate("dt11", dt11);
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TimeSpan ts1 = dt6 - dt5;
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showTimeSpan("dt6-dt5", ts1);
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TimeSpan ts2 = dt10 - dt6;
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showTimeSpan("dt10-dt6", ts2);
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}
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void loop () {
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}
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