[Ovmsdev] Nissan Leaf

[Nikki Gordon-Bloomfield]

So here’s what I’ve learned from the alpha code so far… 

1) It’s recording the parking status accurately, as far as I can tell. within a few minutes of parking, it’s noting that on the app screen. 

2) It’s certainly sending me alerts as you might expect for low SOC warnings. 

3) But sadly SOC isn’t working correctly with my car. For some reason, SOC is jumping all over the shop, with 22% SOC seemingly a favourite place for the OVMS code. On my quick trip just now to the shops, I noted it went from 76% SOC (which I think was fairly accurate given the number of bars I had) down to 22% when I parked up. 

Coming back, I got no update and ended up having to do a hard reboot to get the system to wake up. 

I haven’t been able to get any logs yet because I don’t have a splitter for the ODBII system. I’ll get that sorted later this week/early next. 

Nikki.




On 17 Dec 2013, at 20:06, Nikki Gordon-Bloomfield <nikki at aminorjourney.com> wrote:

> Okay guys. 
> 
> I’ve done a couple of quick tests with the new beta software. 
> 
> First up, it installs (Which is good, of course) Second up: I was able to drive around the block and see some SOC reports. What did appear to happen is that SOC dropped and then went back up again. I had values from 27% SOC down to 14% SOC to Empty and back up to 22% SOC.  I’d guesstimate my real SOC was nearer 45%.  (Although I didn’t check with LEAFSpy)
> 
> Of course, I need to check the other bits and bobs too — Park/Drive status seems to work with the car on — but with the module rebooted, it forgets what was previously on. This is a problem I believe with the LEAF CAN bus, which turns itself off when parked. I’m guessing we’ll need to figure out a way to wake up CAN and then switch back off again? (That said,I think it’s supposed to stay on when charging… and I’m currently charging)
> 
> I’ll play a little more tomorrow and throughout the rest of the week. I’ll also try and get some decent logs if I can. 
> 
> Nikki. 
> 
> 
> On 17 Dec 2013, at 14:16, Mark Webb-Johnson <mark at webb-johnson.net> wrote:
> 
>> 
>> Attached is a first-run at Nissan Leaf support, with a few values read from the bus passively:
>> 
>> Speed
>> Headlight status
>> Park / Drive status
>> SOC
>> 
>> I’ve also pushed this to github (along with a large number of other small changes).
>> 
>> The Nissan Leaf support is proving really hard for me. I don’t have the car, or much CAN bus data, and the public documentation is contradictory and incomplete. End result is that I am just guessing, and completely unable to test my guesses.
>> 
>> Anyway, please try it and let me know if any of those figures show up with any sense of accuracy at all.
>> 
>> Going forward, I really need some CAN bus dumps from a Nissan Leaf. Specifically:
>> 
>> Car idle
>> Car plugged in and charge started
>> Car charging
>> Charge interrupted
>> Driving
>> Driving as close to a constant speed of 10 kph as possible
>> Driving as close to a constant speed of 20 kph as possible
>> Driving as close to a constant speed of 30 kph as possible
>> Car parked, but on
>> Car parked, coming out of park into drive gear
>> Car stopped, coming out of drive gear into park
>> Car in park gear, then handbrake applied
>> 
>> For each of those, both with and without a T connector and LeafSpy running would be helpful.
>> 
>> I’m guessing the logs can be gotten from monitor-all mode with an OBDII adaptor. There is not too much data on the can bus and that should be fast enough.
>> 
>> If anyone can help with the above, please let me know.
>> 
>> Regards, Mark.
>> 
>> <OVMS.X.production.zip>
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> 

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