[Ovmsdev] OVMS v2 Memory/Settings Corruption

Julien Banchet jaxx at jaxx.org
Tue Nov 29 03:05:48 HKT 2016


Hi,
And since I'm paying more attention to it, it really seems linked to bad
connectivity/GSM coverage, my last "plug in" was outside and it didn't
happen.
Also having an issue with the SMS / SMSIP setting, it doesn't seem to be
taken in account correctly (from seeing the app showing Live, next to 49875
days of parking ;-) ), does it need a reset to get it set properly?
(anyways, switched back to an iPhone without the battery voltage showing on
the app)

Regards,
JaXX,
dead, having spent the whole day in a datacenter, 1+1h cold trip in the
Twizy in parisian traffic.


On Mon, Nov 28, 2016 at 7:31 PM, Michael Balzer <dexter at expeedo.de> wrote:

> Hi Greg, welcome :)
>
> Juliens parameter #0 has been overwritten with "Topping o", which is part
> of the charge status message ("Topping off").
>
> So it's much more likely we've got a buffer corruption bug that's
> triggered by (maybe) bad connectivity situations.
>
> Regards,
> Michael
>
>
>
> Am 28.11.2016 um 06:38 schrieb Greg D.:
>
> Hi all,
>
> New here, so this may be totally off the wall.
>
> I notice that the first example, with a "5" going to a "k", it may be more
> easily explained as a bit *shift* instead of a set of flips.  Is there
> anywhere in the system where the bytes are clocked serially between
> devices, where there may be some marginal timing?
>
> Just a thought.
>
> Greg.
>
>
> Mark Webb-Johnson wrote:
>
> $ perl -e 'printf "%08b\n",ord("5");'
> 00110101
> $ perl -e 'printf "%08b\n",ord("k");'
> 01101011
> $ perl -e 'printf "%08b\n",ord("8");'
> 00111000
> $ perl -e 'printf "%08b\n",ord("Z");'
> 01011010
>
> Strange. Seems more than a simple bit flip. I haven’t seen this myself, or heard of it much from other users.
>
> Is the Twizy code using EEPROM for anything other than settings storage? I know that there are a very limit number of write cycles into that EEPROM space.
>
> I did some googling, but all I can find is corruption during writing (either power down, or interrupt during write). But, for our case of very very rare EEPROM writes, that shouldn’t be an issue.
>
> Regards, Mark.
>
>
> On 25 Nov 2016, at 5:47 AM, Michael Balzer <dexter at expeedo.de> <dexter at expeedo.de> wrote:
>
> The EEPROM data loss is a known issue, and I'm afraid there's nothing we can do about that. It seems to be a bug in the PIC18.
>
> Regards
> Michael
>
> Am 24.11.2016 um 22:10 schrieb Julien Banchet:
>
> Hi all,
>
> Thanks to Michaels last message to remind me to ask a question here:
>
> Since a few months, maybe a bit more because it happens only once in a while, I have noticed I wasn't receiving the SMS alerts (feature on SMSIP mode) , and sending a "Stats?" only gave me the nasty access denied answer.
>
> It turns out, using the application, I noticed that the phone number was getting corrupted (afaik, it's the only setting affected)
>
> Normally: "+33651886877" it became "+336k1886877" or "+33651886Z77" etc... like a solar flare bit flip !_______________________________________________
>
> _______________________________________________
> OvmsDev mailing listOvmsDev at lists.teslaclub.hkhttp://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>
>
>
>
> _______________________________________________
> OvmsDev mailing listOvmsDev at lists.teslaclub.hkhttp://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>
>
> --
> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>
>
> _______________________________________________
> OvmsDev mailing list
> OvmsDev at lists.teslaclub.hk
> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.teslaclub.hk/pipermail/ovmsdev/attachments/20161128/01a4f105/attachment.html>


More information about the OvmsDev mailing list