[Ovmsdev] OVMS v2 Memory/Settings Corruption

Julien Banchet jaxx at jaxx.org
Fri Nov 25 16:38:40 HKT 2016

Oh ! This one is impressive
Definitly not bit flip nor single caracter screw-up:
My phone number became "Topping o"! (I was far from topping off, and the
OVMS was plugged 15 minutes before charging the Twizy)

Screenshot this morning


On Fri, Nov 25, 2016 at 8:16 AM, Julien Banchet <jaxx at jaxx.org> wrote:

> Sorry, I only gave flaky examples because I switched phones recently and
> was lazy to digup the old one that had some screenshots
> Here are some real cases
> C33651886877
> +336518867s7
> +3365188T877
> +336518868h7
> That said, it still is way more than a simple bit flip, and only corrupts
> the phone number as far as I can recall.
> I have no explanation, all I can say is, most of the time, I plug the OVMS
> when I plan charging later in the morning, usually when I'm still
> underground and a handful of seconds before putting contact (if this can
> point to any clue)
> Anyways, gonna try cutting GPRS this morning and see how quick it
> discharges and might automate switching SMS<->SMSIP once in a while to keep
> an eye on the battery (my cell operator has an API) though it might wearout
> eeprom even more :-/
> JaXX./.
> On Fri, Nov 25, 2016 at 1:56 AM, Mark Webb-Johnson <mark at webb-johnson.net>
> 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.
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