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// Arduino MCP79412RTC Library

// https://github.com/JChristensen/MCP79412RTC

// GNU GPL v3.0, https://www.gnu.org/licenses/gpl.html

// Example sketch to set the RTC date and time to a hard-coded value,

// using a tmElements_t structure. The same structure is then used to

// read the RTC once per second. This sketch only uses the Time

// library for the tmElements_t definition.

// This is just a simple demonstration of setting the RTC time.

// Note that each time the sketch is run (or the microcontroller is

// reset), the RTC will be set to the same hard-coded time, so this

// example may be of limited usefulness as an actual clock.

#include <MCP79412RTC.h> // https://github.com/JChristensen/MCP79412RTC

#include <TimeLib.h> // https://github.com/PaulStoffregen/Time

tmElements_t tm;

void setup()

{

delay(2000);

Serial.begin(9600);

tm.Hour = 23; // set the tm structure to 23h31m30s on Fri 13Feb2009

tm.Minute = 31;

tm.Second = 30;

tm.Year = 2009 - 1970; // tmElements_t.Year is the offset from 1970.

tm.Month = 2;

tm.Day = 13;

tm.Wday = dowFriday; // See enum in Time.h: Sun=1, Mon=2, ... Sat=7

RTC.write(tm); // set the RTC from the tm structure

}

void loop()

{

RTC.read(tm);

Serial.print(tm.Hour, DEC);

Serial.print(':');

Serial.print(tm.Minute,DEC);

Serial.print(':');

Serial.print(tm.Second,DEC);

Serial.print(' ');

Serial.print(tm.Year + 1970, DEC);

Serial.print('-');

Serial.print(tm.Month, DEC);

Serial.print('-');

Serial.print(tm.Day, DEC);

Serial.println();

delay(1000);

}

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