S20control.php

<?php
// definitions for S20 device
$s20_ip = "udp://192.168.1.x";
$s20_port = 10000;
$s20_mac = "aabbccddeeff"; // MAC adress of S20
$s20_macrev = "ffeeddccbbaa"; //Reverse MAC adress of S20

if(isset($_GET["schalter"]))
{
        if(strcmp($_GET["schalter"], "ein") == 0)
        {
                        //string for switch on
                        $fp = @fsockopen($s20_ip, $s20_port, $errno, $errstr);
                        if (!$fp)
                                {
                                echo "<h1>ERROR:Socket connot be opened: $errstr ($errno)</h1>";
                                exit(0);
                                }
                        $bytemac = hex_str2byte($s20_mac);
                        fwrite($fp, "\x68\x64\x00\x17\x64\x63$bytemac\x20\x20\x20\x20\x20\x20\x00\x00\x00\x00\x01");
                        fclose($fp);
                }
                else if(strcmp($_GET["schalter"], "aus") == 0)
        {
                        //String for switch off
                        $fp = @fsockopen($s20_ip, $s20_port, $errno, $errstr);
                        if (!$fp)
                                {
                                echo "<h1>ERROR:Socket connot be opened: $errstr ($errno)</h1>";
                                exit(0);
                                }
                        $bytemac = hex_str2byte($s20_mac);
                        fwrite($fp, "\x68\x64\x00\x17\x64\x63$bytemac\x20\x20\x20\x20\x20\x20\x00\x00\x00\x00\x00");
                        fclose($fp);
        }
        else echo "ERROR: wrong switch setting (".htmlentities($_GET["schalter"]).") <br>";
}
        usleep(500000);
        //open socket
        $fp = @fsockopen($s20_ip, $s20_port, $errno, $errstr);
        if (!$fp)
        {
                echo "<h1>ERROR:SSocket connot be opened: $errstr ($errno)</h1>";
                exit(0);
        }
        //open listening socket
        $socket = stream_socket_server("udp://0.0.0.0:10000", $errno, $errstr, STREAM_SERVER_BIND);
        if (!$socket) {
                die("$errstr ($errno)");
        }
        //send registration
        $bytemac = hex_str2byte($s20_mac);
        $bytemacrev = hex_str2byte($s20_macrev);
        fwrite($fp, "\x68\x64\x00\x1e\x63\x6c$bytemac\x20\x20\x20\x20\x20\x20$bytemacrev\x20\x20\x20\x20\x20\x20");
        $status = 0;
        $pkt = stream_socket_recvfrom($socket, 24, 0, $peer);
        $status = ord(substr($pkt,23,1));

//output at browser
echo "<h1>Orvibo S20 statuspage</h1>";
echo "<table border=1>";
echo "<tr>";
echo "<td>Actual state of S20 with MAC: $s20_mac and IP: $s20_ip </td>";
echo "<td>S20 state: $status </td>";
if($status=="0")  echo "<td><a href=?schalter=ein><img src=schalter_aus.png border=0 height=30></a></td>";
else echo "<td><a href=?schalter=aus><img src=schalter_an.png border=0 height=30></a></td>";
echo "</tr>";
echo "</table>";

function hex_str2byte($string)
{
                $bytes = "";
                for($i = 0; $i < strlen($string); $i+=2) $bytes .= chr(hexdec(substr($string, $i, 2)));
                return $bytes;
}
?>