DS3231 with Arduino Pro Mini

Using Arduino Programming Questions
1

Hey guys, I've spent lots of time on this and I can't quite figure it out.

How do I connect my Arduino Pro Mini to my DS3231?

I have this board:
http://www.ebay.com/itm/271512227109?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

and this RTC module:
http://www.ebay.com/itm/400503978923?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

2

I can't see the ebay objects in my country

Maybe this will help you: on the Arduino Pro Mini, SDA is pin A4 and SCL is A5

3

guix:
I can't see the ebay objects in my country

Maybe this will help you: on the Arduino Pro Mini, SDA is pin A4 and SCL is A5

Hope this helps:

[Album] arduino

The A4, A5, A6 & A7 pins are on the opposite side of the programming headers.

I did connect everything right and it still isn't working.
(I'm using this library): GitHub - JChristensen/DS3232RTC: Arduino Library for Maxim Integrated DS3232 and DS3231 Real-Time Clocks

I have two RTC modules and neither are working so I know it's not the RTC.

4

Edit: ok I didn't see your edit. So you wired correctly (Vcc to Vcc, Gnd, to Gnd, SDA to A4, SCL to A5). How do you know it's not working? You need to explain in details what you've tried.

Also chinese products often contain little mistakes, maybe the order A4-A7 is reversed or something...

5

Are you using the Pro Mini @ 3V3?..
It will self destruct W/5V Vcc.
If @ 3V3 are you using the Pro mini @ 5V and no level shifters for SCL and SDA it may well let out the magic smoke too..
There are 20 or more sets of valid construction/code for the use of the DS3231..
Mr Google is your friend and depending will typically render an answer.. in 2 seconds or less.
Much faster than asking one of us to do your work for you.

...

6

guix:
Edit: ok I didn't see your edit. So you wired correctly (Vcc to Vcc, Gnd, to Gnd, SDA to A4, SCL to A5). How do you know it's not working? You need to explain in details what you've tried.

Also chinese products often contain little mistakes, maybe the order A4-A7 is reversed or something...

No, I think they're okay.

I just hooked everything up and all of the RTC libraries are just blank in the serial monitor. It's really weird.

7

Okay I got it!

It was because.. I was using a battery to power the RTC seperatly from the Arduino. (don't ask why, I just thought it'd be a smart idea.) I connected it up and it is perfect! Thanks!

8