The code that produces the unwanted message is in SerialPort.pm: 

    # get the current attributes
    $ok = $self->{TERMIOS}->getattr($self->{FD});

    unless ( $ok ) {
        carp "can't getattr: $!";
        undef $self;
        return undef;
    }

[download]

So either comment out the carp ... line, or (if you don't want to mess with the module's source) overwrite the carp routine that has been imported into the Device::SerialPort namespace.  I.e., in your code, before you call the constructor, say 

{
  no warnings 'redefine';
  sub Device::SerialPort::carp { };  # no-op
}

...
    $PortObj = new Device::SerialPort($port, 1) or next;

[download]

The latter is somewhat of a dirty hack, because it of course also disables any carp messages that you might actually want to see...

In reply to Re: Supressing error messages on serial port open in Linux by Eliya
in thread Supressing error messages on serial port open in Linux by pashanoid

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.