Reality has proven we need some simple way to do a factory
reset, we've got users that don't know how to use a serial
USB terminal.
I've implemented the button and SD card methods discussed
earlier.
To do a factory reset you can now alternatively to using
"module factory reset"…
- a) Insert an SD card that has a file
"factoryreset.txt" in the root directory. The file
will be erased, as will be your configuration.
- b) Open the module, remove any SD card, power the
module up, wait for 2-3 seconds until boot has
finished, then push and hold SW2 for 10 seconds.
The SD card needs to be remove for method b because SW2
grounds SD_DATA0 as well. Besides the slight chance to
trigger 10 false readings from a running transmission, I
also found the SD driver to be unforgiving about pushing
SW2 during a transfer. It will eventually lock up the
module completely needing a hard reboot. So it's better to
require SD removal for this method.
Regards,
Michael
Am 22.02.2018 um 07:30
schrieb Greg D.:
Ha, good thought! Put a text file in the root directory named
"factoryreset.txt" containing "OVMSv3" as a key, stick it in, and power
up. Done. Brilliant.
It probably should remove said file once the config is cleared, as a
fail-safe. Don't want it to act as a poison pill.
Only "gotcha" is that finding things that can write to a micro SD card
is becoming harder. No to the iPhone. Also my latest Android, though
it does have an OTG adapter so I can get there with a USB reader. The
ecosystem is trying to force storage to a (paid, data mine-able) cloud,
I think, using space and cost savings as a ruse.
Greg
Mark Webb-Johnson wrote:
The other option is SD CARD.
Firmware update can work that way. Put an ovms3.bin in the root of an SD card, plug it in, and it will be auto-flashed to update firmware.
We could have special files on SD CARD doing certain things. Like safe boot. Factory reset. Wifi AP. etc.
Can we write an SD CARD from an iPad? :-)
Regards, Mark.
Am 22.02.2018 um 06:22
schrieb Greg D.:
We have two buttons:
- Hardwired RESET. That resets the
chip.
- IO0 BOOT. If held during BOOT, that
goes into firmware download mode.
So, only #2 is usable, and that only after boot. I
guess we could have a boot delay to allow time for
it to be pressed after power up.
Yes, something like that. I've worked on products where
holding button #2 after releasing #1 would first take
the product into a reset-to-defaults mode for about 10
seconds, then if you kept holding it after that, would
take you to the downloader.
But, that would require opening up the case to
get to the button. Nasty. Plugging it into a PC is
probably easier?
Hooking to a PC wouldn't necessarily be easier, but
certainly safer. I take it that the buttons on the 3.1
hardware aren't anywhere that can be accessed through a
proverbial paper clip-sized hole, nor in such a way that
a metal paper clip wouldn't be in danger of hitting
something live. Opening my box, I see the 3.0 hardware
is not set up that way. The switches would need to be
moved to the back side of the board for that, and the
holes put in the case. Are we too late?
I guess we can assume that our customers are at least
somewhat technology-literate, and in the event that they
lose their AP pass key, a USB serial console might be a
reasonable way to reset things. But if the only "PCs"
they own are a smart phone and tablet, or in the event
that the module is password protected too, use of the
buttons would still be required. Or, they can cash in
their "phone a friend" token. :) PCs aren't totally
obsolete, yet.
--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
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