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Thread: Dual-speed CAN

  1. #1
    DFR
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    Dual-speed CAN

    Hey guys,

    I'm doing a telemetry project on my car, trying to collect and log a bunch of data using a carpc. I've got a kind of a unique situation on my hands, though: my car has 2 CAN busses, running at different speeds. One is car-wide, moves a lot of temperature and acceleration data, and runs at 500kbps. The other is the datastream from the ECU, and it runs at 125kbps.

    Does anyone know if something like a ValueCAN, that has two inputs, would handle the dual speeds okay?

    Thanks!

  2. #2
    Newbie reinoso's Avatar
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    hello,

    My interface has two CAN inputs , but one is SWCAN.

    Do you need to process both at the same time?

  3. #3
    DFR
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    Yes, I do need to process concurrently

  4. #4
    VENDOR - ScanTool Vitaliy's Avatar
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    Two ValueCANs?
    OBDLink MX: world's smallest, fastest, most advanced OBD/Bluetooth adapter with SW and MS CAN support. Read the review to learn more.
    Need to look up a diagnostic trouble code? Try the most up-to-date, free DTCsearch.com!

    You cannot send me a private message using this forum. Use my email instead: vitaliy[@]scantool.net.

  5. #5
    DFR
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    Two ValueCANs would strain my budget. Is it not possible to use the two channels on the ValueCAN at different speeds? It seems like it should be...

  6. #6
    VENDOR - ScanTool Vitaliy's Avatar
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    As far as I know, you can only monitor one channel at a time. Two OBDLink SXs would run you $100:

    http://store.mp3car.com/OBDLink_SX_2..._p/com-145.htm
    OBDLink MX: world's smallest, fastest, most advanced OBD/Bluetooth adapter with SW and MS CAN support. Read the review to learn more.
    Need to look up a diagnostic trouble code? Try the most up-to-date, free DTCsearch.com!

    You cannot send me a private message using this forum. Use my email instead: vitaliy[@]scantool.net.

  7. #7
    Low Bitrate
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    ValueCAN can do two CANs.. at the same time.. there are two versions a 1x and 2x the 2x is called the ValueCAN3 (don't ask).

    Just go to intrepidcs.com...
    Hack your car's CAN BUS at www.canbushack.com

  8. #8
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    I am rethinking my approach... so wondering if there is a wireless (WiFi, BT) version of OBDLink that would withstand full utilization of 500k bus for let's say 2 hours without "Buffer full" incidents or even worse with quiet loss of frames.

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