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Created April 21, 2014 08:24
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PHP script for sending location APRS message to APRS-IS.
$aprs_callsign = '';
$aprs_passcode = 0;
$aprs_altinfeet = 2080;
// W is the WX icon. See
// Use GPS coordinate format, see
$aprs_coord = '4740.55N/01829.60EW';
$aprs_comment = 'Gerecse WX -';
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket) {
$result = socket_connect($socket, '', 14580);
if ($result) {
// Authenticating
$tosend = "user $aprs_callsign pass $aprs_passcode\n";
socket_write($socket, $tosend, strlen($tosend));
$authstartat = time();
$authenticated = false;
while ($msgin = socket_read($socket, 1000, PHP_NORMAL_READ)) {
if (strpos($msgin, "$aprs_callsign verified") !== FALSE) {
$authenticated = true;
// Timeout handling
if (time()-$authstartat > 5)
if ($authenticated) {
// Sending position
$tosend = "$aprs_callsign>APRS,TCPIP*:@" . date('Hmi') . "z$aprs_coord/A=" .
str_pad($aprs_altinfeet, 6, '0', STR_PAD_LEFT) . " $aprs_comment\n";
socket_write($socket, $tosend, strlen($tosend));
echo $tosend;
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Quite strange...the script worked only one tryes did not update data but no error at all...any idea?

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Please note that date('Hmi') is incorrect. This is hours, month, seconds. It should be date('His') for hours, minutes, seconds.

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Just used your code (modified for my needs) to send my WX station data to the APRS server. Thanks for posting this for other to use. I'll add a link to my code once it's ready to publish.

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