"'Not I,' said the sheep." I get impatient, so used 1s sleep, not 5s. But it works how I believe you intend for me using Strawberry v5.26.0.

use warnings;
use strict;
use Term::ReadKey;

ReadMode 4;
my $key;
while( !defined ($key = ReadKey(-1)) ) {
    print qq(Test\n);
    sleep(1);
}
print qq(Exit With Key $key\n);

__END__

From cmd.exe prompt:

C:\usr\local\share\PassThru\perl\perlmonks>perl 1212444.pl
Test
Test
Exit With Key a

C:\usr\local\share\PassThru\perl\perlmonks>perl -v

This is perl 5, version 26, subversion 0 (v5.26.0) built for MSWin32-x
+64-multi-thread

[download]

relevant update: windows 10, 1709 (os build 16299.248)

irrelevant update: whoops, there was no sheep, just a pig, cat, and rat... and it's actually "and the cat said, 'not I'". I guess it's been a few years since my kids last requested that story.

In reply to Re^7: Win32 Serial Under Windows 7 by pryrt
in thread Win32 Serial Under Windows 7 by PilotinControl

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.