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Thread: Motorola XOOM - 2003 Jeep Grand Cherokee 4x4

  1. #61
    Newbie
    Join Date
    Feb 2008
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    6
    Hi,
    I was able to follow your setup with a WJ/WG CRD and a BT adapter.
    yet i suspect the BT OBD is draining the car's battery...

    On the CRD, unlike the V8, a week battery is catastrophic - the gear would always turn the MIL on while crancking due to the power drop :-(

    Any suggeustion?
    Rabin

  2. #62
    Constant Bitrate
    Join Date
    Sep 2009
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    168
    the OBDII port has a single +12v wire that is constantly powered, you can change that wire to pull from an ignition switched source instead to prevent battery drain. most people put in a switch so they can temporarily put it back to constant power when taking the vehicle to any sort of required inspections.

    alternatively there's this one with a sleep feature that says it's battery safe, but it's $100: http://www.scantool.net/obdlink-mx.html

    did you modify my steering wheel app to work with bluetooth?

  3. #63
    Constant Bitrate
    Join Date
    Sep 2009
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    168
    just this weekend i actually added a bluetooth OBD adapter to my setup for Torque/TouchScan/etc. i'm still using the USB adapter for the main steering wheel button interface.



    the problem with using 2 USB ones was that Android has no-way to identify which is which when they are the same type of device, and most apps don't check if one is in use - they just grab the first one. i made my steering wheel button app able to skip the first one it found if there were 2, but i still had problems sometimes after connecting/disconnecting and reconnecting with torque. it was just simpler to use a bluetooth one for the real OBD II apps.

  4. #64
    Constant Bitrate
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    Sep 2009
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    rear screen projector is nearly complete (for movies at camp!) - more details to come...






  5. #65
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    Quote Originally Posted by theksmith View Post
    the OBDII port has a single +12v wire that is constantly powered, you can change that wire to pull from an ignition switched source instead to prevent battery drain. most people put in a switch so they can temporarily put it back to constant power when taking the vehicle to any sort of required inspections.

    alternatively there's this one with a sleep feature that says it's battery safe, but it's $100: http://www.scantool.net/obdlink-mx.html

    did you modify my steering wheel app to work with bluetooth?
    10x for the advice of disconnecting the power - I think i would eventually go to usb because the car radio BT is somehow very limited, it is a cheap device which lock the BT for phone voice usage only.
    but it works fine with my xoom.

    Regarding the BT and SteeringWheelInterface - I did it in opposite way, i just moved the ButtonActions.java file to the bluetooth android application sample: BluetoothChat .
    Also, i prefered using
    Context.sendOrderedBroadcast(...)
    over
    Runtime.getRuntime().exec("su -c input...")

  6. #66
    Constant Bitrate
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    Jul 2009
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    that is awesome

  7. #67
    Maximum Bitrate rray's Avatar
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    Apr 2012
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    +1 Coolest thing I have seen in a long time!

    Sent from my SCH-I535 using Tapatalk

  8. #68
    Variable Bitrate camo.b's Avatar
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    Very nice! Cant wait till your writeup

  9. #69
    Constant Bitrate Lankin's Avatar
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    Quote Originally Posted by camo.b View Post
    Very nice! Cant wait till your writeup
    +1 Give us the deets! Very cool!

  10. #70
    Constant Bitrate
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    Quote Originally Posted by theksmith View Post
    rear screen projector is nearly complete (for movies at camp!) - more details to come...
    o think you ve just redefined the word camping ...!

    awesome !

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