Real-Time Clock on plugs?

Plugging in devices such as LAN adapters, Wi-Fi cards, printers, etc. to Arch Linux ARM.

Real-Time Clock on plugs?

Postby bodhi » Sun Apr 08, 2012 1:30 am

Guys,

It seems that none of the Pogoplug/Goflex boxes has real-time clock, is that true? If you can point me to one with RTC that can run ALARM or Debian, that would be great!

Thanks,
bodhi
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Re: Real-Time Clock on plugs?

Postby xenoxaos » Sun Apr 08, 2012 10:53 am

The Goflex Home has one, as well as the original Pogoplug V1, Guruplugs, SheevaPlugs, OpenRD....
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Re: Real-Time Clock on plugs?

Postby bodhi » Sun Apr 08, 2012 11:02 am

Thanks xenoxaos! no wonder I thought most of them don't... I have a few different plugs, but none of the ones you've listed :D
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Re: Real-Time Clock on plugs?

Postby pepedog » Sun Apr 08, 2012 12:19 pm

+trimslice, and cubox (although I think "battery" that holds up clock is limited on cubox, not 100% sure)
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Re: Real-Time Clock on plugs?

Postby haiku » Sun Apr 08, 2012 3:25 pm

Who care about RTC when you can sync them with NTP ? :geek:
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Re: Real-Time Clock on plugs?

Postby WarheadsSE » Sun Apr 08, 2012 4:18 pm

Because some devices don't have 24/7 internet :roll: :ugeek:
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Re: Real-Time Clock on plugs?

Postby bodhi » Mon Apr 09, 2012 5:03 am

Thanks for responses guys!

$this->bbcode_second_pass_quote('WarheadsSE', 'B')ecause some devices don't have 24/7 internet :roll: :ugeek:


Right on 8-)
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Re: Real-Time Clock on plugs?

Postby haiku » Mon Apr 09, 2012 6:32 pm

A device without internet connexion is a useless device ;)
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Re: Real-Time Clock on plugs?

Postby WarheadsSE » Mon Apr 09, 2012 7:51 pm

No, a device without a *network* connection is a useless device. But only to a point. The internet is not the all-enabler, I have many devices here in my office without internet connectivity :)
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Re: Real-Time Clock on plugs?

Postby jeevasv » Tue Jan 08, 2013 8:50 pm

All Marvel sheeva CPU's got inbuilt RTC's. All you need to enabled them is to add 1.5V button cell and 32.768khz crystal. Both of them together cost 50cents at the max. But these people save that 50 cents making hackers like us crave.
As per the Marvell spec you can disable the rtc by grounding Xtal_in Xtal_out and rtc_Battery pin's

A RTC is a pleasant and almost necessity to any intelligent device. Yes we can sync to NTP but we shouldn't be living in 1970 if there is no NW.

In Dock star also that is the case. But the board is designed in such a way that these lines are grounded using a 0 ohm resister in the pcb. So all you need is to do is desolder those resistors and connect a crystal and a 1.5 battery to make the RTC ticking.
It took someone with enough resources to desolder the CPU and trace back the lines to discover this.

viewtopic.php?f=6&t=258

So if someone can do the same with POGOPLUG devices we can do the same hack. Eagerly waiting for some help.....
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