Comments on: ESP8266 NodeMCU: DS3231 Real Time Clock Module (RTC) — Getting Time and Setting Alarms https://randomnerdtutorials.com/esp8266-nodemcu-ds3231-real-time-clock-arduino/ Learn ESP8266, ESP32, Arduino, and Raspberry Pi Mon, 28 Apr 2025 09:54:51 +0000 hourly 1 https://wordpress.org/?v=6.8.2 By: John https://randomnerdtutorials.com/esp8266-nodemcu-ds3231-real-time-clock-arduino/#comment-1023690 Sun, 06 Apr 2025 01:27:17 +0000 https://randomnerdtutorials.com/?p=165166#comment-1023690 In reply to Thomas.

The 3231 is accurate to within seconds a year. Been running one for over eight years.

]]> By: Sara Santos https://randomnerdtutorials.com/esp8266-nodemcu-ds3231-real-time-clock-arduino/#comment-1023085 Fri, 04 Apr 2025 10:13:53 +0000 https://randomnerdtutorials.com/?p=165166#comment-1023085 In reply to Thomas.

Hi.
In the situation that you don’t have internet access, this can be a good solution.
Additionally, the alarms can be useful to trigger interrupts.

Regards,
Sara

]]> By: Thomas https://randomnerdtutorials.com/esp8266-nodemcu-ds3231-real-time-clock-arduino/#comment-1023057 Fri, 04 Apr 2025 08:09:52 +0000 https://randomnerdtutorials.com/?p=165166#comment-1023057 I’ll never understand why people use these inaccurate clock shields. Especially not when using an ESP8266 or ESP32. At least then I’ll use an NTP and be on the safe side.

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