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Reset button for pogoplug pro / v3

Posted by schnee 
Reset button for pogoplug pro / v3
November 29, 2017 05:01PM
Maybe this is not the best place for this post, but I did not find any better....

I am trying to install a reset button for the pogoplug v3/pro, but unable to find anything look like a reset pin on the board. Does anyone know if such point exist?

Thanks

Schnee
Re: Reset button for pogoplug pro / v3
November 30, 2017 04:12AM
have you considered putting a switch, inline to the power lead? would this suit your needs.
Re: Reset button for pogoplug pro / v3
November 30, 2017 05:49AM
I thought about that, but i would like to use an ESP8266 to monitor the serial output and reboot the pogoplug in case it freezes. I would like to do it without cutting the power, as cutting the power would also reboot the ESP8266 and it needs additional electronics added to the ESP (relay and transitor etc).
Re: Reset button for pogoplug pro / v3
November 30, 2017 03:54PM
schnee,

Unfortunately, I don't think there is any button supports on this box. And we don't have any GPL info about this SoC to see if there is any pinout like that.

The only person (among us hacking Linux ARM) I think that could answer this question definitely is WarheadsSE (who had NDA with Oxford Semi from way back).

-bodhi
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Forum Wiki
bodhi's corner
Re: Reset button for pogoplug pro / v3
December 01, 2017 05:06AM
Re: Reset button for pogoplug pro / v3
December 01, 2017 02:47PM
schnee,

> Found this post from WareheadSE:
> https://archlinuxarm.org/forum/viewtopic.php?f=55&t=1172&start=20#p7533

Now we are talking :) I vaguely remember something low level like that from WarheadsSE (I've learned a lot from his posts).

-bodhi
===========================
Forum Wiki
bodhi's corner
Re: Reset button for pogoplug pro / v3
December 11, 2017 03:52PM
So i think i figured it out after some tests. There is an RC circuit connected to the reset pin of the CPU. The RC circuit provides the reset impulse at powerup, making sure that the CPU powers up properly. After power up in holds the pin at ~3.3V (VCC). If the pin is bought down to GND and then released the CPU resets and the box reboots.

See pictures for the location of the capacitor (C154) and an empty pair of pin marked as D4. The reset wire can be soldered either directly on the capacitor or on the the empty soldering pad next to it.

Disclaimer: This info is provided as is. I am not responsible if you try it and it fries your board....


Thanks

schnee
Attachments:
open | download - PogoProReset2.png (657.8 KB)
open | download - PogoProReset.jpg (983.3 KB)
Re: Reset button for pogoplug pro / v3
December 12, 2017 12:20PM
Cool!

-bodhi
===========================
Forum Wiki
bodhi's corner
Re: Reset button for pogoplug pro / v3
December 13, 2017 04:16AM
schnee Wrote:
-------------------------------------------------------
> So i think i figured it out after some tests.
> There is an RC circuit connected to the reset pin
> of the CPU. The RC circuit provides the reset
> impulse at powerup, making sure that the CPU
> powers up properly. After power up in holds the
> pin at ~3.3V (VCC). If the pin is bought down to
> GND and then released the CPU resets and the box
> reboots.
>
> See pictures for the location of the capacitor
> (C154) and an empty pair of pin marked as D4. The
> reset wire can be soldered either directly on the
> capacitor or on the the empty soldering pad next
> to it.
>
> Disclaimer: This info is provided as is. I am not
> responsible if you try it and it fries your
> board....
>
>
> Thanks

Schnee,

Post picture after you've solder the wrire.

-bodhi
===========================
Forum Wiki
bodhi's corner
Re: Reset button for pogoplug pro / v3
December 23, 2017 04:01AM
Here is a picture with the wire soldered to the pcb. I also used hot glue to fix it to the PCB.
Attachments:
open | download - pogoReset.jpg (955.9 KB)
open | download - pogoReset2.jpg (278.9 KB)
Re: Reset button for pogoplug pro / v3
December 23, 2017 12:23PM
Added to the Wiki thread.

Quote

Under/Over the hood Modding

Reset button for Pogoplug V3 (OXNAS)

-bodhi
===========================
Forum Wiki
bodhi's corner
Re: Reset button for pogoplug pro / v3
December 24, 2017 10:51AM
well done

very impressive hack!
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