pastebin - collaborative debugging

#!/usr/bin/perl
#

use strict;
use Device::Gsm;

#
die "use: $0 number ex: echo \"msg\" | (perl) $0 dd12345678\n" unless( $ARGV[0] && length( $ARGV[0] ) == 10  );

# Conf
my $myport = $^O =~ /freebsd/ ? '/dev/ttyU0' : '/dev/ttyACM0'; # Define device
my $mypin  = '0000'; # Define pin

my $gsm = new Device::Gsm( port => $myport, pin => $mypin, log => 'file,send.log' );

die "cannot create Device::Gsm object!" unless $gsm;

#
# If you have problems with bad characters being trasmitted across serial link,
# try different baud rates, as below...
#
# .---------------------------------.
# | Model (phone/modem) |  Baudrate |
# |---------------------+-----------|
# | Falcom Swing (A2D)  |      9600 |
# | Motorola v3/v550    |      9600 |
# | Siemens C35/C45     |     19200 |
# | Digicom             |      9600 |
# | Nokia Communicator  |      9600 |
# `---------------------------------'
#

$gsm->connect( baudrate => 9600 ) or die "cannot connect to GSM device on [$myport]\n";
$gsm->register() or die "cannot register on GSM network: check pin and/or network signal!";

print "\nok! connected and registered to network.\n";

# +557188116605
my $prefix = '+55';

my $number = $prefix . $ARGV[0];

my $content;
do {
#       print "\nSMS Text (max 160 chars):\n";
        chomp( $content = <STDIN> );
} until $content;

$content = substr( $content, 0, 160 );

my $lOk = $gsm->send_sms(
        content => $content,
        recipient => $number,
        class     => 'normal'     # try `flash'
);

$lOk ? exit 0 : exit 1;