I've tried to get some information true the OBD2 but it's not giving any info. Anyone tried it also?
mvr
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Great find
You are a true hacker. Are you happy with the 92.10% SoH afer 160,000 km ?
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Well, since I do not really know how it has developed over the years that I have had the car it is kind of hard to judge.Great find
Was the value at 100% when I got the car? I just do not know.
But I guess 92% sounds reasonable, so I am pleased in a sort of realistic way
Check this link out as they mention analysis in 2024 found Generally EV batteries last 15-20 years and on average batteries degrade by 1.8% per year.
Hi!
I came across your post where you explained how you retrieved the State of Health (SoH) of the battery via a UDS CAN message using the 0x496D PID on the Polestar 2 – thank you for sharing that, it was really insightful.
I'm currently trying to achieve the same on my own Polestar 2 using an OBDLink CX adapter, and I was wondering:
Which app or tool did you use to send the CAN message and receive the response?
Was it a PC-based tool (e.g., SavvyCAN, CANalyzer) or an Android app (e.g., Torque Pro, Car Scanner with PID Editor, etc.)?
Any details about your setup (device, app, connection method) would be super helpful!
Thanks in advance!
Harri
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I used SavvyCAN and looked at what CarScanner does when it reads out other values from the BECM. When it tries to read the SoH however it seems to request something else which just does not work.
I found a mention on the internet somewhere (can't really find the link right now since I am not at the right computer) about which DID to read for SoH, and turned out that was the correct information. I found that information some time ago, but I never really figured out how to actually read and what IDs to use until i snooped the traffic of CarScanner.
For actually reading the value out I used a software of my own development which is a further development of this:
GitHub - olalid/esp32_EVSoCReader: Reads electric or hybrid vehicle battery state of charge and sends to MQTT server.
Reads electric or hybrid vehicle battery state of charge and sends to MQTT server. - olalid/esp32_EVSoCReader
github.com
It should be possible to read with CarScanner or other software if you set up a custom read. There is a settings menu for that in CarScanner but it is not exactly crystal clear documented how to use, but I have never tried very hard to figure it out.
To read it with SavvyCan should be fairly easy.
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Take. My. Money.Sneak peak of something I am working on
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Cheap Yellow Display inside? 🤓
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I did not. Glad to see people poke these cars and document their findings!
I tried a bit more using Car Scanner custom sensor, however the most I got out of it was "?" instead of "NO DATA"
I tried
0322496D00000000, 22496D00000000, 0322496D etc.
I'm starting to believe my cheapo ELM clone OBD2 adapter might not support 29bit headers: Car Scanner reports "ATSH1DD01635" as "not supported by the adapter"
I tried a bit more using Car Scanner custom sensor, however the most I got out of it was "?" instead of "NO DATA"
I tried
0322496D00000000, 22496D00000000, 0322496D etc.
I'm starting to believe my cheapo ELM clone OBD2 adapter might not support 29bit headers: Car Scanner reports "ATSH1DD01635" as "not supported by the adapter"
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Well, it is cheap, but not exactly that.
I bought this OBD2 reader with a display from Aliexpress called a NEXPEAK A203, which I have reverese-engineered and developed my own custom firmware for.
I will release the firmware as open source once I am happy with how it works.
At the moment I am struggling a bit with sleep mode, if I just keep polling for data when the car wants to shut down, that stops the car from going to sleep which is obviously not a good thing.
I can detect when the car is in park, but I have not been able to figure out if/where it is signaled when the car wants to shut down.
I have figured out an algorithm that sort of works, but I am not 100% happy with it yet.
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Note though that this information is not relevant for the CAN bus in the OBD2 port, this documents a different internal CAN bus.
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Could that be a workaround for the missing camping/dog mode?
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Interesting thought...
Well, what I have seen is that the center display and drivers display won't shut down, what other parts of the car will stay awake I do not know really...
I've tried through terminal with a 29bit capable obd2 adapter:
->FC RX TIMEOUT
I assume the header address or the DID is different for my car (MY2023)
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I have never tried using the AT commands of an ELM327 directly, so not at all sure, but I would try this:
ATH1
ATSP7
ATSH1DD01635
ATCRA1EC6AE80
03224996D00000000
ATSP7: Protocol 7 should be 29-bit 500 kbit/s, while 6 seems to be 11-bit 500 kbit/s.
ATCRA1EC6AE80: because I think you will need to tell it at what address to expect the answers.
My car is a 2021 model, I think a 2023 should have roughly the same hardware?
Hey, thanks for the input! ChatGPT had a lot of input on how to use the ELM327 AT commands, but I should have double checked the ATSP6...
I'll try using ATSP7 and the ATCR.
Still no success for this (NO DATA). I triedHey, thanks for the input! ChatGPT had a lot of input on how to use the ELM327 AT commands, but I should have double checked the ATSP6...
I'll try using ATSP7 and the ATCR.
ATH1
ATSP7
ATSH1DD01635
ATCRA1EC6AE80
0322496D00000000
I also tried to send the message using spaces / without trailing 0s (03 22 49 6D)
02 10 03 (Diagnostic Session) also replied with "NO DATA"
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Did you put the car in to gear (Any of R N D works)?
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