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Thread: OBDLink MX -- coming soon to MP3Car.com

  1. #31
    VENDOR - ScanTool Vitaliy's Avatar
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    Quote Originally Posted by FierceElements View Post
    Unfortunately, I am. =(

    Just got the adapter today and gave it a try with the Torque app on my Galaxy Tab. It connected and started giving the app ECU data right away. However, after a few car starts suddenly the check engine and traction control disabled lights came on, and the cruise control light started flashing. The latter two indicate those systems (traction control and cruise control) have been disabled. I read the error code with Torque, which came up as U0073 (Control Module Communication Bus "A" Off).

    This guy had the same problem and apparently linked it to his GL1 cable being constantly plugged into his OBDII port.

    Any idea what's going on here?
    I'm sorry to hear that. What is the year/make/model of your car? Can you look at your OBD port, and let me know which pins are populated?

    We have received a couple of reports of similar issues from other users of Torque (which is a great app, by the way). The problem is rather complicated, involving the PowerSave functionality and the scenarios under which the tool is being used, but the bottom line is that CAN bus communication gets interrupted. Once communication is restored, the lights eventually turn off on their own. Non-CAN vehicles do not seem to be affected.

    We will likely publish an update that implements a workaround for this issue next month. In the meantime, you can avoid the problem by unplugging MX prior to starting the engine. I know it's a clunky solution -- sorry.

    Vitaliy
    — 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.

  2. #32
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    tripzero's Avatar
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    I notice that if I "atma" for a long time, I eventually get a "buffer full" message. How do I avoid this?
    Former author of LinuxICE, nghost, nobdy.
    Current author of Automotive Message Broker (AMB).
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  3. #33
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    Quote Originally Posted by tripzero View Post
    I notice that if I "atma" for a long time, I eventually get a "buffer full" message. How do I avoid this?
    What's the speed and utilization of the bus? What's the time needed to get "buffer full"? If I remember correctly BT part of MX works at 115 or 230kbaud max so that's the bottleneck. For some time internal buffer keeps up with the incoming data but since outgoing speed is lower then incoming it eventually gets full. I believe you can resolve the issue only by filtering incoming traffic from the bus.

  4. #34
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    Quote Originally Posted by marlasr View Post
    What's the speed and utilization of the bus? What's the time needed to get "buffer full"?
    SW CAN 33.6kbps iirc.

    I'm connected to the MX at 9600kbps (I don't think I can connect any faster, can I?)

    If I remember correctly BT part of MX works at 115 or 230kbaud max so that's the bottleneck. For some time internal buffer keeps up with the incoming data but since outgoing speed is lower then incoming it eventually gets full. I believe you can resolve the issue only by filtering incoming traffic from the bus.
    That's right, I can filter stuff. Thanks.
    Former author of LinuxICE, nghost, nobdy.
    Current author of Automotive Message Broker (AMB).
    Works on Tizen IVI. Does not represent anyone or anything but himself.

  5. #35
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    Quote Originally Posted by Vitaliy View Post
    I'm sorry to hear that. What is the year/make/model of your car? Can you look at your OBD port, and let me know which pins are populated?
    It's a 2011 Subaru WRX.

    Looking at my OBDII port, I *think* it has pins 1-5, 9, and 11 populated. Hopefully that makes sense.

    I haven't run into this problem since employing your workaround of unplugging the device before starting the car.

    I eagerly await an update that fixes the problem, however.

  6. #36
    VENDOR - ScanTool Vitaliy's Avatar
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    Quote Originally Posted by tripzero View Post
    SW CAN 33.6kbps iirc.

    I'm connected to the MX at 9600kbps (I don't think I can connect any faster, can I?)
    It doesn't matter what you set the virtual COM port baud rate to, Bluetooth ignores it (see for yourself: set it to 300 bps). The Bluetooth module inside MX is already running at the fastest speed it reliably supports. In our testing, we found that there is a huge difference in performance between various Bluetooth/USB dongles. We got the best results with the micro adapter from IOGEAR.

    Vitaliy
    — 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. #37
    VENDOR - ScanTool Vitaliy's Avatar
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    Quote Originally Posted by FierceElements View Post
    It's a 2011 Subaru WRX.

    Looking at my OBDII port, I *think* it has pins 1-5, 9, and 11 populated. Hopefully that makes sense.
    Not really. A 2011 model must support CAN for diagnostics (pins 6 & 14), and it must have power (pin 16). Top of the connector is wider than the bottom, and pin 1 is in the top left corner.




    I haven't run into this problem since employing your workaround of unplugging the device before starting the car.

    I eagerly await an update that fixes the problem, however.
    We will send a mass email to all MX customers, as soon as the update is out.

    Vitaliy
    — 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.

  8. #38
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    Is it possible to connect with the 9141-2 protocol (auto-detected on my Seat Leon) to read the engine oil temperature?
    With the OBDWiz isn’t possible, can I using a terminal tool for these? (A connection using putty for read Data such as rpm and speed works fine)
    Is it also possible to use the KWP1281or KWP2000 protocol for read out measuring block groups?

  9. #39
    VENDOR - ScanTool Vitaliy's Avatar
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    Quote Originally Posted by obdelix View Post
    Is it possible to connect with the 9141-2 protocol (auto-detected on my Seat Leon) to read the engine oil temperature?
    With the OBDWiz isn’t possible, can I using a terminal tool for these? (A connection using putty for read Data such as rpm and speed works fine)
    Is it also possible to use the KWP1281or KWP2000 protocol for read out measuring block groups?
    Post your OBDwiz comm logs here. If you can't get coolant temp in OBDwiz, you won't be able to pull it through putty -- unless something weird is going on.

    Vitaliy
    — 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.

  10. #40
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    Here is the OBDwiz log: RawDataLog_20120530 194132.txt

    The EngineCoolantTemp is available, but I need the oil temp.
    Can I connect to the car for read out measuring block groups? Over CAN or otherwise?

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