Arduino and DS3231 Real Time Clock Tutorial

In this Arduino Tutorial we will learn how to use the DS3231 Real Time Clock Module.

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[jpb]

PSA for anyone using this RTC (DS3231), there is a badly designed charging circuit on this particular module (ZS-042 and probably others). You must either use a rechargeable LIR2032 battery or disable the charging circuit. You can do so by cutting the trace or removing the diode or resistor. Otherwise, using a non-rechargeable CR2032 could cause it to swell and explode. Although, even with a rechargeable LIR2032, the charging voltage is too high at ~4.7 V relative to the spec of 4.2 V, which may also cause issues. The recommenced option is to remove the diode with a pair tweezers or by desoldering, and use a regular CR2032 battery. There is a thread about this issue on the Arduino forums.

[EricTViking]

This is an excellent video, all the info you need to get started in under 4 minutes - thank you 👍 I get fed up with YouTubers that pad a 5 minute video to 35 minutes - droning on with "blah, blah, blah" and naff video animations (naming no names).

[christiankongsted]

To anyone that was in my shoes where the serial moniter only prints nonsense, I oversaw the baud rate. If it's making a ton of ????, match your serial moniters baud rate to 115200 (as seen in the video).

[RandomPerson-c]

0:06 captions
*"Hello then dogs here from how to catch Onix"*

[youpattube]

Very good instructional video. There are so many bad ones out there that I was getting discouraged. Thanks.

[batmantherooster]

Thanks for the Excellent easy to understand video. I am great at building the circuit but horrible at programming. It’s like I’m terrified of programming

[redelectron]

Ds3231 in incredible for time keeping projects😍

[رجلالسلام-خو]

Thanks for your great simple explanation in this video .How to use a library to set time automatically with DS3231 RTC?

[arahmankabir]

Thank you for your important video on how to add AM PM code to your real time clock.

[drakethomas]

I'm having an issue with the programming part. I downloaded both libraries and it still doesn't work but I suspect, based of what I'm reading, that the library is isn't completely identifying certain variables/parts, such as:
DS3231 rtc(SDA, SCL);

[plazmax]

you can add temp and alarm to this prject better, ds3231 has temp function but not too good like dht22 but its ok for little project

[shivanighadge]

Thankyou sir... The video is very helpful but I want to know in which software the schematic is made ... Can you mention the name of software please

[mohamedabdelfattah]

Thanks a lot for this helpful video.

There is a note:

It works with me when I changed the serial as follow:
// Serial.begin(115200);
Serial.begin(9600);

[ifell]

Great video, i got a 'warning deprecated conversion from string constant to 'char*' -wwrite-strings' but can you clarify this is nothing to worry about? Regards

[Isotope]

can you provide the wiring scheme for the added LCD example? thanks

[zyghom]

people forget to say: when 5V is in use and non rechargeable battery, you MUST break the charging path - otherwise your 3V battery may explode ;-) if you connect to 3.3V it will not happen as there is a diode in the circuit. same no issue if you use 5V and rechargeable battery ;-)
one more thing as bonus: this module has extra EEPROM that can be used ;-)

[DheeruMoolya]

Nice project easy and simple to understand

[amirsohailansari]

thank u Dejan
you always give very useful tutorials..

[maxvandervoort]

How can I read out, for example the time, as an integer, so that I can make a alarm clock with it?

[luthodyiki]

Thank you very much. I’ve got a problem this device after a day the time becomes of by around 6 seconds from the real time how can I fix that.


Thank you