http://www.perlmonks.org?node_id=836504


in reply to GSM problem

Your script obviously must have write access to /dev/ttyACM0. So 755 permission is not enough, probably should be 777.

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Re^2: GSM problem
by choroba (Cardinal) on Apr 23, 2010 at 11:53 UTC
    I fear that the permission refers to the script file, not the device.
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