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mydoghasworms
Asked: 2012-03-27 08:48:16 +0800 CST

gsm-ussd gives device busy or error (100)

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I am using gsm-ussd to try and query my data balance from my 3G modem.

When I issue the commands

gsm-ussd -m /dev/ttyUSB0 '*188#'

or

gsm-ussd -m /dev/ttyUSB2 '*188#'

I get either "Device or resource busy" (when it is in used and connected) or "Unknown error (100)".

My device (Huawei E173) seems to create 3 devices in /dev, namely ttyUSB0, ttyUSB1 and ttyUSB2. None of them work, and ttyUSB1 gives a somewhat different problem, as it just give the following message:

* Wrong modem device (use -m <dev>)?
* Modem broken (no reaction to AT)

UPDATE I found the following post, but I am already doing what it says: http://mybroadband.co.za/vb/showthread.php/382977-8-ta-E173-on-openSUSE-with-USSD-setup

networking modem 3g

1 Answers

  1. I have a Huawei E1780 which also creates /dev/ttyUSB0 , /dev/ttyUSB1 and /dev/ttyUSB2

    gsm-ussd --device /dev/ttyUSB2 --no-cleartext '*100#'

    works for me. You can also add --debug maybe that helps finding the problem.

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