first commit

libraries/RTCLib_by_NeiroN/examples/datecalc/datecalc.ino

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+// Simple date conversions and calculations
+
+// #include <Wire.h>
+#include <RTClib.h>
+
+void showDate(const char* txt, const DateTime& dt) {
+  // buffer for DateTime.tostr
+  static char buf[20];
+
+  Serial.print(txt);
+  Serial.print(' ');
+  Serial.print(dt.tostr(buf));
+
+  Serial.print(" = ");
+  Serial.print(dt.unixtime());
+  Serial.print("s / ");
+  Serial.print(dt.unixtime() / 86400L);
+  Serial.print("d since 1970");
+
+  Serial.println();
+}
+
+void setup() {
+  Serial.begin(9600);
+
+  DateTime dt0(0, 1, 1, 0, 0, 0);
+  showDate("dt0", dt0);
+
+  DateTime dt1(1, 1, 1, 0, 0, 0);
+  showDate("dt1", dt1);
+
+  DateTime dt2(2009, 1, 1, 0, 0, 0);
+  showDate("dt2", dt2);
+
+  DateTime dt3(2009, 1, 2, 0, 0, 0);
+  showDate("dt3", dt3);
+
+  DateTime dt4(2009, 1, 27, 0, 0, 0);
+  showDate("dt4", dt4);
+
+  DateTime dt5(2009, 2, 27, 0, 0, 0);
+  showDate("dt5", dt5);
+
+  DateTime dt6(2009, 12, 27, 0, 0, 0);
+  showDate("dt6", dt6);
+
+  DateTime dt7(dt6.unixtime() + 3600); // one hour later
+  showDate("dt7", dt7);
+
+  DateTime dt8(dt6.unixtime() + 86400L); // one day later
+  showDate("dt8", dt8);
+
+  DateTime dt9(dt6 + TimeDelta(7 * 86400L)); // one week later
+  showDate("dt9", dt9);
+}
+
+void loop() {
+  // do nothing
+}