[Ovmsdev] OVMS v2 Memory/Settings Corruption

Michael Balzer dexter at expeedo.de
Fri Nov 25 05:47:39 HKT 2016

Hi Julien,

I was lucky to get my charger exchanged just before end of warranty,
it's definitely better with the charger keeping the 12V battery up.

Tough situation when parking underground. The module may use a lot of
energy if the GSM and GPS situation is bad. Switching off GPRS and GPS
should save a lot of power then. I'll have a look at it.

Have you tried switching off GPRS to see how much that will help?

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.


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 !
> It seems it happens only upon reconnection of the ovms module the the
> OBD plug (Twizy) as, well, the 12V battery, though brand new, can't
> last a weekend (car parked underground, I suppose the GSM needs to
> force a bit too much)
> So question: Has any one suffered from such an issue ?
> And, otherwise, Michael might be able to tell:
> Would having the feature on SMS only (without IP) consume less energy
> ? If so, would it possible to imagine a Hybrid mode, IP active only if
> vehicle on charge or keyon ?
> Thanks,
> JaXX,
> PS: Despite winter, thinking of building a solar panel + thin plexi
> sandwich for the rooftop, just because of the 12V battery :-) Only
> recent twizys can charge the 12V from the traction battery when resting.
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Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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