Vida CEM swapping

Post by **TonyToronto** » 25 Nov 2023, 20:24

If you bought from reputable supplier, likely good. Any other place these days, roll of the dice.
Also, search for different code, the P1 branch. helped me with stubborn P1

Volvisti · Post by **Volvisti** » 25 Nov 2023, 21:28

in vtl's repo i see no p1? or where do you mean?
i am at the moment in germany at friends place, where we tried it at his car, anyone suggestions where i can buy here "good" pieces? (only staying until christmas though)
thanks
V

oscilloscope · Post by **oscilloscope** » 26 Nov 2023, 02:18

CANBUS sniffer question I'm on the hunt for a decent passive can sniffer. As I want to be able to intercept the packets & try too link them up the corresponding data when it's fetched from the eeprom memory data. It might end up in a dead end but its worth ago

Post by **TonyToronto** » 26 Nov 2023, 10:02

Volvisti wrote: ↑25 Nov 2023, 21:28 in vtl's repo i see no p1? or where do you mean?
i am at the moment in germany at friends place, where we tried it at his car, anyone suggestions where i can buy here "good" pieces? (only staying until christmas though)
thanks
V

https://github.com/cmolson/volvo-cem-cr ... s/one_pass
https://github.com/cmolson/volvo-cem-cracker
I believe i got here.

dikidera · Post by **dikidera** » 27 Nov 2023, 01:37

oscilloscope wrote: ↑26 Nov 2023, 02:18 CANBUS sniffer question I'm on the hunt for a decent passive can sniffer. As I want to be able to intercept the packets & try too link them up the corresponding data when it's fetched from the eeprom memory data. It might end up in a dead end but its worth ago

Raspberrypi with a dual can shield + socketcan and cansniffer. Works for me and allows me to build python tools and prototype easily.
It's then a matter of requesting the diagnostic parameters and correlating with the bytes from the streaming data with some slight offset to correct for delayed data between requested and actual.

oscilloscope · Post by **oscilloscope** » 28 Nov 2023, 23:59

dikidera wrote: ↑27 Nov 2023, 01:37
oscilloscope wrote: ↑26 Nov 2023, 02:18 CANBUS sniffer question I'm on the hunt for a decent passive can sniffer. As I want to be able to intercept the packets & try too link them up the corresponding data when it's fetched from the eeprom memory data. It might end up in a dead end but its worth ago
Raspberrypi with a dual can shield + socketcan and cansniffer. Works for me and allows me to build python tools and prototype easily.
It's then a matter of requesting the diagnostic parameters and correlating with the bytes from the streaming data with some slight offset to correct for delayed data between requested and actual.

Did you have a diagnostic parameter list ? Or did you passively watch what was being fetched with dice when commonded ? , in the mean time I'll check the pi out and see what it's like to use. Is there a preference on the version of pi / dual canshield?

dikidera · Post by **dikidera** » 29 Nov 2023, 01:05

I in fact do have a parameter list. It's all contained in Volvo DHA and it's related dds files. Now, according to @vtl, the streaming CAN data's offsets are stored in VIDA as well, I really couldn't believe it. So in the end you might not even need to correlate data.

I personally had to, I had to reverse engineer the ECM and TCM to see params that were not mentioned in Volvo DHA.

oscilloscope · Post by **oscilloscope** » 29 Nov 2023, 06:48

dikidera wrote: ↑29 Nov 2023, 01:05 I in fact do have a parameter list. It's all contained in Volvo DHA and it's related dds files. Now, according to @vtl, the streaming CAN data's offsets are stored in VIDA as well, I really couldn't believe it. So in the end you might not even need to correlate data.

I personally had to, I had to reverse engineer the ECM and TCM to see params that were not mentioned in Volvo DHA.

Interesting... , the reason I'm trying too is to write a program to perform the synchronisation for the sid807evo and p2 cem unit. Codecard pulled the application for sale & the application is near impossible too crack unless you know how to reverse Oreans now called Themida. , I have tried and tried.. I had tried capturing the data with a logic analyzer. But that didn't capture anything of use. As I would need 144 pin analyzer which would probably cost a billion pounds. ( sarcasm)

Post by **vtl** » 29 Nov 2023, 07:00

oscilloscope wrote: ↑29 Nov 2023, 06:48 Interesting... , the reason I'm trying too is to write a program to perform the synchronisation for the sid807evo and p2 cem unit. Codecard pulled the application for sale & the application is near impossible too crack unless you know how to reverse Oreans now called Themida. , I have tried and tried.. I had tried capturing the data with a logic analyzer. But that didn't capture anything of use. As I would need 144 pin analyzer which would probably cost a billion pounds. ( sarcasm)

You approach it wrong. https://xkcd.com/538/

oscilloscope · Post by **oscilloscope** » 29 Nov 2023, 16:22

vtl wrote: ↑29 Nov 2023, 07:00
oscilloscope wrote: ↑29 Nov 2023, 06:48 Interesting... , the reason I'm trying too is to write a program to perform the synchronisation for the sid807evo and p2 cem unit. Codecard pulled the application for sale & the application is near impossible too crack unless you know how to reverse Oreans now called Themida. , I have tried and tried.. I had tried capturing the data with a logic analyzer. But that didn't capture anything of use. As I would need 144 pin analyzer which would probably cost a billion pounds. ( sarcasm)
You approach it wrong. https://xkcd.com/538/

Your right! I'll get the wrench and head over too volvo R&D

Vida CEM swapping

Re: Vida CEM swapping