<!--<form action="" method="post" >
<input type=text name=cmd />
<input type="submit" value="   send   " name=send />-->

<?php


  $filename = "/dev/ttyUSB1";



    if (!$handle = fopen($filename, 'r+'))

    {

      echo "The device isn't detected";

      exit;

    }

    else

    {

      if (fwrite($handle,"AT\n"))

     {
        //while(!feof($handle))

        $reply = fread ($handle,4);
        echo $reply;






      }
        else

              echo "The device isn't read";

    }

               fclose($handle);
	die;

?>