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Thread: ZTE Phone Unable to open?

  1. #1
    Junior Member
    Join Date
    Sep 2015

    ZTE Phone Unable to open?

    Whenever I try to start the robot, or create a config file, I get the error "Unable to open Modern Robotics USB DC Motor Controller" and "unable to find USB device with serial number AL00XTIS"

  2. #2
    Senior Member
    Join Date
    Oct 2013
    Niskayuna, NY
    Do you have the motor controller connected to the phone over USB (with lights turning on)? If you scan to create a new config file, does it fail to find it? (if so, it could mean issues with cables, the controller, the phone's USB port, or the PDM).
    FTC6460 mentor (software+computer vision+electronics), FPGA enthusiast. In favor of allowing custom electronics on FTC bots.
    Co-founder of ##ftc live chat for FTC programming--currently you may need to join and wait some time for help--volunteer basis only.

  3. #3
    Junior Member
    Join Date
    Aug 2015
    go into config, scan, and if the motor controller and other modules are still there, save. this happens with our servo controller, and this always fixes it

  4. #4
    Junior Member
    Join Date
    Sep 2011
    1) Note that the robot config remembers the specific core modules that were attached. If someone swapped out (or reassembled) with a different S/N DC Motor Controller it won't accept it.
    2) If you are using a Core Power Module from last year, some had a bug that cause them to sometimes not see all the connected modules
    3) The connection from the phone to the Core Power Module is fragile and can sometimes get flaky.

    To check out your hardware, download the Core Device Discovery Windows application from Modern Robotics
    This will allow you to identify and check out your hardware directly from your PC without your phone.
    Also, once you have done that, I recommend you label your modules with their USB S/N (Ex:AL00XTIS)

  5. #5
    Senior Member
    Join Date
    Apr 2015
    Naples, Fl
    We have that happen every time the phone is restarted. We go to restart robot several times and it finally behaves. Sometimes it takes as many as 5 or 6 restarts.

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