void checkTimeAndSync() {
// Sync with NTP server every 1 hour (3600000 ms)
if (millis() – lastSyncMillis >= 3600000) {
Serial.println(“Synchronizing time with NTP…”);
syncTime();
lastSyncMillis = millis(); //do this so it doesn’t keep trying to sync every loop after the first hour.
}
}

resetting lastSyncMillis to millis() so the code doesn’t keep bugging ther NTP server.

Great.
Thanks for sharing.
Regards,
Sara

Here is a link to the code:
http://www.github.com/Testroadtech/Arduino-Projects

Hi.
That’s a very interesting solution.
If you want, please share the code. But use a link to Github.
Don’t paste it directly here as the formatting will be messed up.

Tank you.
Regards,
Sara

I could not get the desired outcome with ESP32 sleep/wakeup, as all the tutorials I could find had all the code running in the setup function. I was able to get it to work by setting up display on and off millis timers, turning off the display (display.ssd1306_command(SSD1306_DISPLAYOFF); after a set time, and an “if” statement “if (touchRead(T0) < threshold)” triggering a similar command to turn the display back on.
I have had some OLEDs get degraded displays due to burn-in after being on too long, so it was important to me to have a way to blank it off when not in use.
I can post the code if you are interested.

Thanks for the clarification.

Hi.
I’m sorry. I forgot to mention, that in the case of the DS3231, the isrunning() function should be replaced with lostPower().

Regards,
Sara

Hi Hans, I like the article too, but I have the same question. What is the benefit of the RTC?