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Unable to read information from car #2

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liamstears opened this issue Oct 10, 2023 · 2 comments
Open

Unable to read information from car #2

liamstears opened this issue Oct 10, 2023 · 2 comments

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@liamstears
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I want to make the Volvo low-speed CAN bus adapter for my 2007 XC90 but I am failing at the first hurdle of getting canbus information using CANLogger

I expected on the left hand side to have an address like 01234567 using 7 digits/letters hex but instead I get 00000123 using only last 3 digits/letters hex and I can't seem to link any information to anything useable. For example I press steering wheel buttons to find this but I see no obvious codes from this I just get hundreds of constant codes that I cant understand

I have attached short video and logdata I hope you can help me understand this and get this to work and get the information I need to build Volvo can bus adapter

20231010_102032.mp4

20231010_102539.logdata.txt

@liamstears
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I have found my MCP2515 has 8mhz crystal. I programmed 16mhz when I used Arduino IDE. If I change to 8mhz in Arduino ide I get nothing at all. Do I need MCP2515 with 16mhz crystal maybe?

@liamstears
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Ok I tried 16mhz crystal and it did not work at all. Only 8mhz crystal with 16mhz setting gives me any readings at all.

@olegel please help...

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