[Ovmsdev] Nissan Leaf remote Climate issue

Stein Arne Sordal ovms at topphemmelig.no
Wed Jun 27 14:38:29 HKT 2018



> On 22 Jun 2018, at 12:54, Tom Parker <tom at carrott.org> wrote:
> 
> On 15/06/18 19:02, Stein Arne Sordal wrote:
>> 
>> I have attached a capture from the 2014-model when starting climate control. I see that the “stop after 15 min frame” actually is sent multiple times. I always send it one time and thats ok.
>> 
> 
> On my 2016 car if I send the 0x46 frame once, after the last 0x4e frame, the car wakes up and then goes back to sleep without enabling climate control. I adjusted things to send it a couple of seconds after the 0x4e frame and this made it work. Climate control came on and then turned off again after about 15 minutes (I removed the old code so this was the car switching itself off).
> 
> Do you happen to have a capture of everything on the bus with timestamps for the whole remote climate control start up sequence?


Attached is a complete capture without timestamp (i used an arduino with a simple receive library).


> 
> I'm guessing that the TCU is waiting for something from the car before switching to the next step. I suspect this is the same with locking, the ovms is blindly sending the remote command message a fixed number of times and the lock message causes my car to try to lock multiple times.

Even when the TCU is completely isolated from the car, it still sends the “stop frame”. My guess is that it´s timer-based.

> 
>> 
>> The "stop after 15 min frame" for pre-2016 looks like this:
>> 
>> data[0] = 0x46;
>> 
> 
> Nice, the existing code to support new and old will work on this too.
> 
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