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ErriezDS3231SetGetDateTime.ino
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ErriezDS3231SetGetDateTime.ino
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/*
* MIT License
*
* Copyright (c) 2020 Erriez
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*!
* \brief DS3231 RTC set and get date/time example for Arduino
* \details
* Source: https://github.com/Erriez/ErriezDS3231
* Documentation: https://erriez.github.io/ErriezDS3231
*/
#include <Wire.h>
#include <ErriezDS3231.h>
// Create RTC object
ErriezDS3231 rtc;
#define DATE_STRING_SHORT 3
// Month names in flash
const char monthNames_P[] PROGMEM = "JanFebMarAprMayJunJulAugSepOctNovDec";
// Day of the week names in flash
const char dayNames_P[] PROGMEM= "SunMonTueWedThuFriSat";
void setup()
{
// Initialize serial port
delay(500);
Serial.begin(115200);
while (!Serial) {
;
}
Serial.println(F("\nErriez DS3231 read example"));
// Initialize I2C
Wire.begin();
Wire.setClock(100000);
// Initialize RTC
while (!rtc.begin()) {
Serial.println(F("RTC not found"));
delay(3000);
}
// Set date/time: 12:34:56 31 December 2020 Sunday
if (!rtc.setDateTime(12, 34, 56, 31, 12, 2020, 0)) {
Serial.println(F("Set date/time failed"));
return;
}
// Set square wave out pin
// SquareWaveDisable, SquareWave1Hz, SquareWave4096Hz, SquareWave8192Hz, SquareWave32768Hz
rtc.setSquareWave(SquareWaveDisable);
}
void loop()
{
char name[DATE_STRING_SHORT + 1];
uint8_t hour;
uint8_t min;
uint8_t sec;
uint8_t mday;
uint8_t mon;
uint16_t year;
uint8_t wday;
// Read date/time
if (!rtc.getDateTime(&hour, &min, &sec, &mday, &mon, &year, &wday)) {
Serial.println(F("Read date/time failed"));
return;
}
// Print day week
strncpy_P(name, &(dayNames_P[wday * DATE_STRING_SHORT]), DATE_STRING_SHORT);
name[DATE_STRING_SHORT] = '\0';
Serial.print(name);
Serial.print(F(" "));
// Print month
strncpy_P(name, &(monthNames_P[(mon - 1) * DATE_STRING_SHORT]), DATE_STRING_SHORT);
name[DATE_STRING_SHORT] = '\0';
Serial.print(name);
Serial.print(F(" "));
// Print day month
Serial.print(mday);
Serial.print(F(" "));
// Print time
Serial.print(hour);
Serial.print(F(":"));
if (min < 10) {
Serial.print(F("0"));
}
Serial.print(min);
Serial.print(F(":"));
if (sec < 10) {
Serial.print(F("0"));
}
Serial.print(sec);
Serial.print(F(" "));
// Print year
Serial.println(year);
// Wait a second
delay(1000);
}