Epoch.ino

/**
  ******************************************************************************
  * @file    Epoch.ino
  * @author  WI6LABS
  * @version V1.0.0
  * @date    12-December-2017
  * @brief   RTC epoch example
  *
  ******************************************************************************
  * @attention
  *
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  *
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  ******************************************************************************
  */

#include <STM32RTC.h>

/* Create a rtc object */
STM32RTC rtc;

void setup() {
  Serial.begin(9600);

  rtc.begin(); // initialize RTC 24H format

  rtc.setEpoch(1451606400); // Jan 1, 2016
}

void loop() {
  Serial.print("Unix time = ");
  Serial.println(rtc.getEpoch());

  Serial.print("Seconds since Jan 1 2000 = ");
  Serial.println(rtc.getY2kEpoch());

  // Print date...
  Serial.print(rtc.getDay());
  Serial.print("/");
  Serial.print(rtc.getMonth());
  Serial.print("/");
  Serial.print(rtc.getYear());
  Serial.print("\t");

  // ...and time
  print2digits(rtc.getHours());
  Serial.print(":");
  print2digits(rtc.getMinutes());
  Serial.print(":");
  print2digits(rtc.getSeconds());

  Serial.println();

  delay(1000);
}

void print2digits(int number) {
  if (number < 10) {
    Serial.print("0");
  }
  Serial.print(number);
}