main

.pio/libdeps/esp32-s3-devkitc-1/RTClib/examples/softrtc/softrtc.ino

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+// Date and time functions using just software, based on millis() & timer
+
+#include "RTClib.h"
+
+RTC_Millis rtc;
+
+void setup () {
+    Serial.begin(57600);
+
+#ifndef ESP8266
+    while (!Serial); // wait for serial port to connect. Needed for native USB
+#endif
+
+    // following line sets the RTC to the date & time this sketch was compiled
+    rtc.begin(DateTime(F(__DATE__), F(__TIME__)));
+    // This line sets the RTC with an explicit date & time, for example to set
+    // January 21, 2014 at 3am you would call:
+    // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
+}
+
+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(now.hour(), DEC);
+    Serial.print(':');
+    Serial.print(now.minute(), DEC);
+    Serial.print(':');
+    Serial.print(now.second(), DEC);
+    Serial.println();
+
+    Serial.print(" seconds since 1970: ");
+    Serial.println(now.unixtime());
+
+    // calculate a date which is 7 days and 30 seconds into the future
+    DateTime future (now.unixtime() + 7 * 86400L + 30);
+
+    Serial.print(" now + 7d + 30s: ");
+    Serial.print(future.year(), DEC);
+    Serial.print('/');
+    Serial.print(future.month(), DEC);
+    Serial.print('/');
+    Serial.print(future.day(), DEC);
+    Serial.print(' ');
+    Serial.print(future.hour(), DEC);
+    Serial.print(':');
+    Serial.print(future.minute(), DEC);
+    Serial.print(':');
+    Serial.print(future.second(), DEC);
+    Serial.println();
+
+    Serial.println();
+    delay(3000);
+}