Your description of the problem is not especially clear for me, but I see that you're accessing single serial port from multiple threads without any synchronization, so I'm not surprised you have a problem. Only one client may write into serial port at a time, so I'd recommend you rewrite this script without threads, it would be much less code to debug then. Also, if you would add error checks after IO operations, it could help to find the problem too. E.g. instead of: 

print $lclient "$lpeer -> Welcome\n\r";  # it will never be sended!

[download]
you can write 
print $lclient "$lpeer -> Welcome\n\r" or die "Send failed because: $!
+";

[download]

In reply to Re: TCP Socket and Serial Port by zwon
in thread TCP Socket and Serial Port by FlyingEagle

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.