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Hi All, I am using AT commands to talk to USB GSM Modem. In the event of abrupt close of the device, my modem is not responding for any commands. ...
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  1. #1
    Just Joined!
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    Aug 2011
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    USB GSM modem not responding properly after abrupt close of device


    Hi All,

    I am using AT commands to talk to USB GSM Modem.

    In the event of abrupt close of the device, my modem is not responding for any commands.

    I get the below \r\n chars only as a response. Any Idea about this?

    SENDING ....
    000000: 41 54 0d 0a AT..
    RECEIVING ....
    0d
    0a

  2. #2
    Linux Guru Rubberman's Avatar
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    I can be found either 40 miles west of Chicago, in Chicago, or in a galaxy far, far away.
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    I suspect the modem was left in an "indeterminate" state by the abrupt shutdown. Is there anyway to physically reset it to a factory-fresh state? Most such devices that I have seen can do so, even if you have to pop the cover off of it to access the reset port.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

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