38 lines
870 B
Plaintext
38 lines
870 B
Plaintext
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// Warning: set DS_RTC_USE_WIRE nonzero in SoftRTClib.h
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// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
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#include <Wire.h>
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#include <SoftRTClib.h>
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#if !DS_RTC_USE_WIRE
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#error set DS_RTC_USE_WIRE nonzero in SoftRTClib.h
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#endif // DS_RTC_USE_WIRE
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RTC_DS1307 RTC;
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void setup () {
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Serial.begin(9600);
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Wire.begin();
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}
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void loop () {
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DateTime now = RTC.now();
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now.printIsoDateTime(&Serial);
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Serial.println();
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Serial.print(" since midnight 1/1/1970 = ");
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Serial.print(now.unixtime());
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Serial.print("s = ");
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Serial.print(now.unixtime() / 86400L);
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Serial.println("d");
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// calculate a date which is 7 days and 30 seconds into the future
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DateTime future (now.unixtime() + 7 * 86400L + 30);
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Serial.print(" now + 7d + 30s: ");
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future.printIsoDateTime(&Serial);
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Serial.println();
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Serial.println();
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delay(3000);
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}
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