Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU0011)

Real Time Clock modules for microcontrollers
rocklobster
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Joined: Mon Jan 20, 2014 9:21 pm

Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by rocklobster » Wed Jan 22, 2014 3:15 pm

@andrew

When running from the 5V feed from the arduino it's fine - it only loses time when disconnected (ie, running from it's own lithium battery). Is that what you meant?

hobbyfx
Posts: 2
Joined: Fri Jan 10, 2014 9:49 am

Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by hobbyfx » Thu Jan 23, 2014 3:02 am

andrew wrote:@hobbyfx

The address in these modules come fixed and are not set in software. The 24C32 device itself can have different I2C address via its address pins A0-2 but on this module they are all grounded to give a fixed address of 0x50.
Thank you Andrew.
if thats so, perhaps the example sketch above should have a revision and state that as a line comment for us newbies :)

andrew
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Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by andrew » Thu Jan 23, 2014 10:55 am

@rocklobster

So whatever the problem is, it is related to when it's powered from the battery. It sounds like the battery voltage it getting too low but your measurements suggest it's fine. I can't connect your forum account details to your ebay account. If you would like us to look into replacing it could you send an email to sales @ hobbycomponents.com with an order number or ebay user name and we can take it from there.
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andrew
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Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by andrew » Thu Jan 23, 2014 10:56 am

@hobbyfx

Done :-)
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rocklobster
Posts: 8
Joined: Mon Jan 20, 2014 9:21 pm

Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by rocklobster » Thu Jan 23, 2014 7:56 pm

@andrew

Have emailed my ebayID.

It's been running all day on 5V and kept time fine, an hour this evening on bat and it's already lost 15 mins. Am looking to get another nano anyway so if that helps save you postage to send a replacement then that would work for me...

cheers

andrew
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Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by andrew » Fri Jan 24, 2014 12:24 pm

Thanks, we've responded to your email.
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rocklobster
Posts: 8
Joined: Mon Jan 20, 2014 9:21 pm

Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by rocklobster » Mon Jan 27, 2014 8:04 pm

Just to update, replacement arrived today along with my nano order - superfast replacement, thanks!

Just fitted it and it's all working fine. Appears to have lost no time at all in 30 mins off power - that's good enough for me :-)

Thanks again, excellent CS for an ebay seller. Already recommended you to others...

Cheers!

andrew
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Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by andrew » Wed Jan 29, 2014 11:35 am

Glad to hear that its all working now and thanks for the recommendations but don't forget about our website, our stuff is cheaper on there ;-)
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marco78
Posts: 3
Joined: Sat Feb 01, 2014 11:47 am

Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by marco78 » Sat Feb 08, 2014 1:36 pm

Hi, I'm quite new to arduino due and I'm trying to use the HCMODU0011 module on it. I have provided 5V power supply and made the connections to SDA and SCL using a logic level converter suitable for I2C (just to be sure 5V is used instead of 3.3V). Unfortunately, loading the example here reported nothing happens: I have noted that software stops during the creation of HCRTC library instance. Can someone help me in solving the problem?
Thanks a lot

andrew
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Re: Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU00

Post by andrew » Sat Feb 08, 2014 3:12 pm

The library hasn't been tested with the due but I can't think of any obvious reason why it shouldn't work. I'll set one up to check this but before I do this but can you tell me which pins you are connecting to on the due and how you are level shifting it?
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