\Thank you for the quick response.

1) Here is the Perl code I am using:

#!/usr/bin/perl

use IO::Socket::INET;

$| = 1;

my ($socket,$received_data,$peeraddress,$peerport);

$socket = new IO::Socket::INET (LocalPort => '26',Proto => 'udp') or d
+ie "ERROR in Socket Creation : $!\n";

while(1) {

    $socket->recv($recieved_data,1024);

    $peer_address = $socket->peerhost();
    $peer_port = $socket->peerport();

    print "\n($peer_address, $peer_port) said : $recieved_data";

    $data = "data from server\n";

    print $socket "$data";

}

$socket->close();

[download]


2) The GPS unit is made by CalAmp (http://www.calamp.com/products/cellular-a-gps/fleet-tracking-units/236-lmu-1200-gprs). There isn't much information online about it unfortunately.

3) Here is the Hexdump results from one of the transmissions:

0000000 0583 3112 7900 0197 0101 0002 4e01 e6c6
0000010 00fc 0000 0000 0000 0000 0000 0000 0000
0000020 0000 0000 0000 0000 022c ffd0 2fcd 0f00
0000030 0208 0019 0000
0000035

In reply to Re^3: UDP Packet Encoding by nEMESIS4
in thread UDP Packet Encoding by nEMESIS4

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