[Ovmsdev] Introduction - message replay and other topics
dexter at expeedo.de
Tue Oct 11 01:34:36 HKT 2022
Ludovic, welcome :-)
you're right, can play is unfinished. It seems it wasn't needed up to
now, you're welcome to finish it. Mark would best comment on what's
missing there, as it was his concept & framework draft.
Another local option is replaying a set of specific frame sequences by
scripts running series of "can tx" and/or "can rx" commands.
Regarding dashboard development, you can simply add a random metrics
data generator to the UI. You can find templates for this in the examples:
Documentation of course can always be improved :-)
Am 10.10.22 um 00:34 schrieb Ludovic LANGE:
> Hello everyone,
> My name is Ludovic and I've just bought an OVMS for a R&D project I'm
> working on. I know how to read/write some (easy) code, and am not
> afraid of (digital) electronics too. I've managed to compile, and
> flash FW to this unit.
> My use-case is to use OVMS as an aid during the testing phase / tuning
> of an EV vehicle:
> * Using OVMS as a pure data-logger of the CAN Bus (to SD card, with
> an automatic offload to a remote server as soon as a network
> connexion is available) - i.e. logging during the runs, and
> dumping the data either as soon as possible, or when the vehicle
> is back in the shop.
> * Also making use of the "dashboard" functions to have an in-vehicle
> display (phone/tablet) of the main parameters of interest : GPS
> Speed, Motor RPM, some BMS parameters, some controller parameters,
> ... so that the test driver can have some feedback on the
> internals of the vehicle.
> Part of my plan is to explore the DBC-based vehicles of OVMS, and for
> that I was interested in using the "replay mode" that has been
> contributed to the code in 2019 :
> ; however it does indeed look like a work in progress - as I wasn't
> able to make it replay something.
> I've not delved much into the code (yet ?) but it looks that some
> implementations are incomplete (like `canplay_vfs::InputMsg`) and
> could explain that. But first I wanted to ask here what was your
> experience with this part - is it working for you in some state, even
> buggy ?
> "replay mode" is not absolutely necessary but could be a huge time
> saver - otherwise I'd have to replay from another CANBus transceiver -
> and I'd prefer an integrated environment.
> "replaying" is interesting for the setup phase as I'll be able to
> fine-tune the DBC setup ; have the metrics generated and then have the
> dashboard displaying "live" data - without needing a real vehicle test.
> Also in the plan is to build a customized dashboard from a chosen set
> of metrics. This looks easy and well documented as far as I could
> tell, and I do not expect a lot of difficulties here ; what do you think ?
> Also part of the plan would be to have a way to log to fixed-size
> files (either based on the number of events captured on the CANBus ;
> or based on the duration of the capture - like every 5 minutes) and to
> find a way to "rsync" them to a remote server. I do not intend to use
> the "server" connection (be it V2 or V3) as my use-case is a little
> bit different and I need to retrieve raw CANBus data, not processed
> metrics - for later post-processing (with SavvyCAN etc...). I'm open
> to any advices on the feasibility of this.
> Finally, as a newcomer I'll also try to help with documentation on
> things that I struggled with or that are evident but not in the doc yet.
> Thanks everybody who created (and contributed to) this project that
> looks a fantastic tool to observe and tinker with vehicles!
> Please feel free to share your thoughts on this.
> Regards from France,
> Ludovic LANGE
> OvmsDev mailing list
> OvmsDev at lists.openvehicles.com
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