Vida CEM swapping

Treur · Post by **Treur** » 19 Feb 2026, 09:08

vtl wrote: 19 Feb 2026, 09:04
Treur wrote: 19 Feb 2026, 09:02 Is this what I think?
I don't know. What do you think?

Don't pay attention

buruss · Post by **buruss** » 19 Feb 2026, 16:14

Hello Guys!

Could someone help me with kaev's soft?
always getting timeout reception error during read.
sometimes 1 sec sometimes 5 sec. one time it worked 20sec before it stopped.
12v fine 5v fine. pins also fine i think because it can detect chip and also start comm.

buruss · Post by **buruss** » 19 Feb 2026, 16:17

oops. Forgot screenshot

duzi · Post by **duzi** » 19 Feb 2026, 23:49

(kaev) the previous version worked stably ...

buruss · Post by **buruss** » 20 Feb 2026, 00:41

google struggling even to find this version.
But i try to get another ardu because T5Luke's script also has a lot of questionmark and other garbage when i use it.
i have a dump from my original CEM. can i flash it with vdash or something? i can't verify if it is a good read but i hope because d5t5 got me pins from it. I read it with willem but i can't write with it. last option to flash it with xgecuT48 since i got one last week

duzi · Post by **duzi** » 20 Feb 2026, 02:52

5.0.1 only for MEGA2560, control via terminal.
Connect the Kaev library (add lib)
Power on > CEM.
Reads OK. Erase before writing.
R/W to SD card.

Treur · Post by **Treur** » 20 Feb 2026, 03:07

buruss wrote: 20 Feb 2026, 00:41 google struggling even to find this version.
But i try to get another ardu because T5Luke's script also has a lot of questionmark and other garbage when i use it.
i have a dump from my original CEM. can i flash it with vdash or something? i can't verify if it is a good read but i hope because d5t5 got me pins from it. I read it with willem but i can't write with it. last option to flash it with xgecuT48 since i got one last week

You can do it with Volvo TechNest via CAN bus.

duzi · Post by **duzi** » 20 Feb 2026, 03:22

There are a lot of paid solutions...they are not worth advertising.

Treur · Post by **Treur** » 20 Feb 2026, 03:53

duzi wrote: 20 Feb 2026, 03:22 There are a lot of paid solutions...they are not worth advertising.

You are the last one whose opinion interests me.

gajoss · Post by **gajoss** » 20 Feb 2026, 05:42

vtl wrote: 16 Feb 2026, 10:19
gajoss wrote: 16 Feb 2026, 09:39 I'm confused. I tried all the shuffle orders contained in the code for my CEM number. The result was negative. Should I try other shuffle orders as well?
In attachment LOGs from the last attempts.
Use one_pass version: https://github.com/cmolson/volvo-cem-cr ... e/one_pass

I used the one_pass version with shuffle order 2. It didn't work. Further attempts with a different shuffle order.
LOG in attachment.