[Ovmsdev] Firmware release 3.3.005 / CAN SAE timing

[Michael Balzer]

We delayed the release due to the CAN bus crashing issues initially 
assumed to be related to the new poller:

  * Simon Ehlen (Ford Focus Electric, in development)
  * Derek Caudwell (Leaf)
  * Chris Box (Leaf)
  * Developer from Jokela (Leaf)
  * on Github: Jaroslav Horak, with detailed bus analysis by Richard
    Taylor (Leaf)
      o →
        https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/980


I've lost track of the current status of the different issues & 
investigations. My current impression is, none of the tested 
software/config changes actually had any impact.

Richard Taylor found out the Leaf issue with boots & reboots of the 
module is triggered by the switched off SN65 transceiver. But it's still 
unclear why that happens, why a terminator doesn't help and why it only 
seems to affect the Leaf (what about the Ford Focus, Simon?).

So this points to some hardware issue, possibly something more on the 
Leaf than the OVMS side.

The SW changes meant to minimize SN65 off time are not yet complete, 
there's a Housekeeping init change to be tested & possibly added (see 
github issue).


Did the changed CAN timing to better follow the SAE recommendations 
actually have any benefits?

I currently don't think so. Developer From Jokela posted:
> After this change poller now sends tx commands, compared to before when it did not.
… but that claim didn't match the statistics and wasn't confirmed.

Simon, is it correct the poller filter additions solved your issues, and 
the changed timing didn't have any effect?

Richard still needs to test the timing change, but the Leaf issue is 
clearly correlated to boots/reboots.


So, does/did anybody see any positive effect from the SAE timing patch?

Besides the SN65 control enhancement, is there anything else open that 
needs to be included in 3.3.005?

Thanks & regards,
Michael


Am 14.01.25 um 13:35 schrieb Michael Balzer via OvmsDev:
> Everyone,
>
> I'd say release 3.3.005 is due. 3.3.004 was 03/2024, we've since 
> collected quite some fixes and new features, including extensions for 
> Smart EQ & the new MG4 support. There are lots of new Smart users now, 
> as Mercedes have stopped support for the official Smart EQ App (see 
> https://www.smart-emotion.de/article/415-mercedes-discontinues-smart-eq-app-3rd-party-community-app-takes-over/).
>
> The current state is also very stable, I had no issue reports.
>
> Any objections / open fixes or additions that should be included in 
> 3.3.005?
>
> Regards,
> Michael 

-- 
Michael Balzer * Am Rahmen 5 * D-58313 Herdecke
Fon 02330 9104094 * Handy 0176 20698926

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