CAN logs from aux DLC port

7980 Views 24 Replies 7 Participants Last post by bdvolt, Nov 27, 2017

notAhoser

Discussion Starter · Mar 29, 2017

First off - I don't own a Volt. I am attempting to use the battery from a Volt in something totally different and I'd like to figure out the CAN messages that the Volt sends to the cell balance electronics while it's charging. I believe the information I want is only available on the HV side CAN bus, which is available on the aux DLC port. Does anyone have such a log they can share?

I'm in southern Wisconsin, so if you're within an hour or two I'd love to plug my CAN snooping gear into your Volt and get a log for myself.

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notAhoser

Discussion Starter · #21 · Jul 8, 2017

jcramer said:
Hey, notAhoser, what CAN bus snooping gear do you use, where did you get it, and how much did it cost. I might like to do a bit of Can-snooping too.

I use a laptop with Linux and a USB to CAN adapter. I bought one from 8devices called, simply, USB2CAN. http://shop.8devices.com/usb2can It's $65 and it works perfectly. Linux has drivers built in and I use it with the Linux canlib and Wireshark. Wireshark is pretty useless for analysing CAN, but it's great for making really huge logs and searching them without problems. Once that's done I just export the frames and analyse using a few other tools (spreadsheet, etc).

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jcramer

· #22 · Jul 8, 2017

Interestingly, http://shop.8devices.com/usb2can says that USB2CAN units are out of stock.

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tofelec

· #23 · Jul 8, 2017

I think dat "the option" to upgrade the onboard charger is on the aux dlc port... i try to find

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notAhoser

Discussion Starter · #24 · Jul 8, 2017

jcramer said:
Interestingly, http://shop.8devices.com/usb2can says that USB2CAN units are out of stock.

There are other ones out there, but this was a nicely priced option and it works perfectly even under heavy load.

tofelec said:
I think dat "the option" to upgrade the onboard charger is on the aux dlc port... i try to find

I'm not sure what you mean here - but the aux dlc port is the one that has the CAN bus with all the charging action on it.

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bdvolt

· #25 · Nov 27, 2017

Earlier in the thread you offered to share the recorded log files. Could you please do so as I would also like to work with them. I am also very interested in the canbus data for temperature and balancing data. If you could post this information that would be great.

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