how to communication with the Access Controller?

[samuelxin]

Hi every one
i have a Access Controller mechine
want send data and get the data from server

the retailer say i can use the TCP/IP to communication with it
i try meny time, use the socket, but fail.
could you teach me how to
thank you

code

$ip='280.88.287.18';  // i used also udp, but fail  udp://280.88.287.18 
$port=4660;             //port
$packet = '078000052'; // send the data, ascii code
 $fp = fsockopen($ip, $port, $errno, $errstr, 30); // 

fwrite($fp, $packet); //send data

while (!feof($fp)) {
	$data=fread($fp, 26);  // read
	echo $data;
}

Bogus IP to protect the innocent. Weedpacket

[Weedpacket]

What do you get in $errno and $errstr? Follow the fsockopen() line with

if($fp===false) die("Failed to open the socket: Error #".$errno);

[samuelxin]

if print this $errstr

nothing at all