erriez / erriezds1307 Goto Github PK

Maybe add:
/*!

• \brief Convert to Unix UTC epoch time_t
• \return

•  Unix epoch time_t seconds since 1970.
  

*/
time_t ErriezDS1307::getEpoch(struct tm *rdt)
{
time_t t;

// Convert date/time struct tm to time_t
t = mktime(rdt);

// An offset is needed for AVR target

#ifdef ARDUINO_ARCH_AVR
t += UNIX_OFFSET;
#endif

// Return Unix epoch UTC
return t;

}

It helped me to get an automatic RTC update based on Compiled time&date in my application:
if (rtc.read(&rtc_dt))
{
Serial.println("Time fetched from RTC IC....");
}
else
{
Serial.println("Time NOT fetched from RTC IC....");
}

if (rtc.getEpoch(&dt) > rtc.getEpoch(&rtc_dt))
{
// Set new date time
Serial.print(F("Set RTC date time..."));
if (!rtc.write(&dt)) {
Serial.println(F("FAILED"));
} else {
Serial.println(F("OK"));
}
}
And of course no battery yet installed.

It is not working on esp32 on ports that you mention in the table, maybe there is a slip-up with it. I tested it on Arduino Uno and it works great with the same RTC. With the Example that U posted I get a debug "RTC not found". I'm also not connected to the SQW pin on the RTC, but I think it is not required to just get/set time. It could be my fault but IDK.

Hi, this routine is giving me error in Platform IO for ESP32 Devkit:

...
uint8_t gv_hour;
ErriezDS1307 rtc;
Wire.begin();
Wire.setClock(100000);

if (!rtc.setDateTime(08, 55, 00,  25, 11, 2021, 4)) {
...

invalid digit "8" in octal constant
invalid octal digit

If I set the hour to 8, then the function doesn't work at all and throws error.
Only setting hours from 10-23 works fine.
Same goes for minutes and seconds...
Can you please help me overcome this little issue?