Onnowpurbo: New page: ==Code== // DS3231_UnixTime (C)2014 Henning Karlsen // web: http://electronics.henningkarlsen.com/ // // A quick demo of how to use my DS3231-library to // convert date and time to...

2016-03-03T09:19:16Z

New page

==Code==

// DS3231_UnixTime (C)2014 Henning Karlsen
// web: http://electronics.henningkarlsen.com/
//
// A quick demo of how to use my DS3231-library to
// convert date and time to UnixTime
//
// To use the hardware I2C (TWI) interface of the Arduino you must connect
// the pins as follows:
//
// Arduino Uno/2009:
// ----------------------
// DS3231: SDA pin -> Arduino Analog 4 or the dedicated SDA pin
// SCL pin -> Arduino Analog 5 or the dedicated SCL pin
//
// Arduino Leonardo:
// ----------------------
// DS3231: SDA pin -> Arduino Digital 2 or the dedicated SDA pin
// SCL pin -> Arduino Digital 3 or the dedicated SCL pin
//
// Arduino Mega:
// ----------------------
// DS3231: SDA pin -> Arduino Digital 20 (SDA) or the dedicated SDA pin
// SCL pin -> Arduino Digital 21 (SCL) or the dedicated SCL pin
//
// Arduino Due:
// ----------------------
// DS3231: SDA pin -> Arduino Digital 20 (SDA) or the dedicated SDA1 (Digital 70) pin
// SCL pin -> Arduino Digital 21 (SCL) or the dedicated SCL1 (Digital 71) pin
//
// The internal pull-up resistors will be activated when using the
// hardware I2C interfaces.
//
// You can connect the DS3231 to any available pin but if you use any
// other than what is described above the library will fall back to
// a software-based, TWI-like protocol which will require exclusive access
// to the pins used, and you will also have to use appropriate, external
// pull-up resistors on the data and clock signals.
//

#include <DS3231.h>

// Init the DS3231 using the hardware interface
DS3231 rtc(SDA, SCL);

Time t;

void setup()
{
// Setup Serial connection
Serial.begin(9600);
// Uncomment the next line if you are using an Arduino Leonardo
//while (!Serial) {}

// Initialize the rtc object
rtc.begin();
}

void loop()
{
// Send Current time
Serial.print("Current Time.............................: ");
Serial.print(rtc.getDOWStr());
Serial.print(" ");
Serial.print(rtc.getDateStr());
Serial.print(" -- ");
Serial.println(rtc.getTimeStr());

// Send Unixtime
// ** Note that there may be a one second difference between the current time **
// ** and current unixtime show if the second changes between the two calls **
Serial.print("Current Unixtime.........................: ");
Serial.println(rtc.getUnixTime(rtc.getTime()));

// Send Unixtime for 00:00:00 on January 1th 2014
Serial.print("Unixtime for 00:00:00 on January 1th 2014: ");
t.hour = 0;
t.min = 0;
t.sec = 0;
t.year = 2014;
t.mon = 1;
t.date = 1;
Serial.println(rtc.getUnixTime(t));

// Wait indefinitely
while (1) {};
}

Arduino: RTC DS3231 Unix Time - Revision history

Onnowpurbo: New page: ==Code== // DS3231_UnixTime (C)2014 Henning Karlsen // web: http://electronics.henningkarlsen.com/ // // A quick demo of how to use my DS3231-library to // convert date and time to...