[Ovmsdev] Fixed VIN from IncomingPollReply first frame data?

[Robin O'Leary]

On Sun, May 06, 2018 at 10:02:58AM +0200, Michael Balzer wrote:
> just a note: I've used this neat ISO-TP implementation for my Arduino projects: https://github.com/altelch/iso-tp
> 
> …specifically for https://github.com/dexterbg/Twizy-Cfg to provide the OBD2 commands.
> 
> The OVMS OBD polling framework is currently really just meant to
> provide periodical polling of basic registers. I will need a more
> flexible and complete ISO-TP
> implementation for issue #95 as well, was thinking about a general
> service for this like I did with CANopen.

Yes, I suspect that much of the confusion about data bytes and lengths
in PollerReceive would have be avoided if there was a lower level class
handling the fiddly bits of ISO-TP.  And it would be great to have that
available separately for other purposes---I wouldn't then have to use
the periodic polling functionality to get something like the VIN, which
only needs a one-off query.

> ... So if you'd like to
> implement a better ISO-TP framework, go ahead :)

Not sure I am sufficiently up to speed on some of the features needed
to do this yet, but I'd be interested in looking at it.
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