On 27/01/17 13:36, Collin Kidder via EV wrote:
Any logs anyone could send me from a Leaf would be great. But, I might
be on to something. Byte 4 (the fifth byte if you start counting at 0)
is always a constant value for a given car. It stays the same across
all 0x5C0 frames, it stays the same whether driving or charging. Every
vehicle I've got a capture from has a unique byte here that never
changes with any captures from that car no matter what else the car is
doing. Pretty much all of the rest of the bytes change as you charge
or discharge. I think what might be happening is that this byte is a
sort of identifier that the rest of the system uses to see whether the
pack is the same one it last knew. 256 unique values might not seem
like a lot but that means that your odds of getting a pack with the
same byte as your old pack is 1/256 or less than 0.5% - not so likely.
One way to test this would be to set up a man in the middle
configuration and then change that byte and see if it makes the car
puke. Or, take a car with a replaced pack and try to change the
reported byte from the new LBC to the reported byte from the old LBC
and see if the car then wants to work better.
I don't see a constant here. With the exception of one capture, each
capture from my car has a single value in byte 4 but it is decreasing
(except once when it went down and up) slowly over the last year or so
for which I have data:
Each line represents one capture and has the following format
byte_number value_in_hex:count_in_decimal
4 84:7
4 84:12
4 84:14
4 84:80
4 84:252
4 84:128
4 84:10
4 84:14
4 82:1607
4 82:40
4 82:22
4 82:91
4 80:40
4 80:4332
4 7e:14
4 7e:53
4 7c:531 fe:1
4 7c:36
4 7c:19
4 7c:6
4 7a:72
4 7c:8
4 7c:22
4 7c:8
4 7c:28
4 7c:30
4 7c:1
4 7a:40
4 7a:165
4 7a:38
4 7a:54
The exception was captured during remote climate control, and I have 531
frames with 7c with one frame containing fe about 2/3 of the way through
the capture:
157227 2017-01-07 08:38:05.031301 LBC 0x5c0 16 STD:
0x000005c0 c0 72 74 00 7c d4 00 00
157533 2017-01-07 08:38:05.531215 LBC 0x5c0 16 STD:
0x000005c0 00 fe fe 00 fe fc 00 00
157227 2017-01-07 08:38:05.031301 LBC 0x5c0 16 STD:
0x000005c0 c0 72 74 00 7c d4 00 00
I have 2 short captures made on the same day from a Gen 2 and there it
alternates between two values:
4 ba:5 c0:2
4 ba:8 c0:4
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