[Ovmsdev] Trying to get a new car in, CRTD, CANbus and all

Julien “JaXX” Banchet jaxx at jaxx.org
Tue Jul 16 01:49:37 HKT 2019

> On 15 Jul 2019, at 19:28, Michael Balzer <dexter at expeedo.de> wrote:
> Julien,
> hope you got that e-UP at a reasonable price, they were pretty far overpriced on introduction. But they seem to be very efficient, so good choice.

9600€ second hand 2014 64000km, perfect shape, all (few) wearable parts replaced, that’s 3 to 4000€ less than the usual second hand price in France, though the double-batteried new versions (also arriving via Seat and Skoda) is probably gonna bump down the second hand market on pre 2019 models.

A friend, IT engineer at VW France, told me to give it a shot and ask for a battery swap, they haven’t answered *shrug*, but well, 150km is more than enough for me

And damn, the little bug packs a punch, I can trigger traction control a tad too easily, lots of fun, and comfort compared to the Twizy, in all honesty :)

Anyways, that’s me digressing.

> Your CRTD log only shows OBD2 requests, and there seem to be four devices answering to them.
> As Craig wrote, the process data may be on another bus, and the bus you're on now only does request/response communication.
> Next would be to check for more CAN buses and to check out more OBD2 requests targeted at those four devices.

Yeah, all I saw was eventually pulling down K-Line to trigger some diag modes, though, with an OBDEleven dongle, I could play with the dashboard dials with the car fully on, so I don’t know at which point triggering that generates or opens more traffic or not without having to stall the car. I might end up opening it up to see which pins are used by elimination.

I don’t believe from the little I read that CAN1 is used at all, but again, lots of the content I find are for older birds… or get my hands on a screw on OBD plug to poke around… 

The road will be long, but I will certainly not be satisfied by the embedded CarNet service (gotta see how that thing is connected! That’s an idea)

The Twizy was simple in a sense ;-)

> Regards,
> Michael
> Am 15.07.19 um 16:43 schrieb Julien “JaXX” Banchet:
>> Hi everyone, and happy summer to all !
>> So, sold my Twizy a month ago, the OVMSv3.1 has left with it, got a VW e-UP! a little bit before and received a v3.2 last week.
>> Threw away a few microSDs but got a CRTD log this afternoon.
>> While I have the weird impression 1335 lines and 55kB ( https://pastebin.com/FAZqnzie ) for a 30 minute drive back from work seems very short, I tried reading it in SavvyQT but it “salvages” only the first 35 lines.
>> (30 minutes kinda full left aside the wipers, ignition off, on, launch, lights, windows, reversing, and even blinkers that Parisians try to avoid using for some odd reason, so yeah, 1335 lines, that’s not even a frame per second, something is missing)
>> No DBC found on the interwebz for volkswagen’s AA/12 platform, so I’m in for making a first probably ? That is if the sole CANBus connected got anything worthy (OBDII vehicle module used)
>> I have understood VAG cars are a bit different in a way, I wouldn’t be surprised accessing VW busses need a bit of help :)
>> Anybody around with a bit of knowledge with these cars ?
>> Best,
>> JaXX./.
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