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@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 list
OvmsDev@lists.teslaclub.hk
http://lists.teslaclub.hk/mailman/listinfo/ovmsdev




_______________________________________________
OvmsDev mailing list
OvmsDev@lists.teslaclub.hk
http://lists.teslaclub.hk/mailman/listinfo/ovmsdev


-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26