1.php与com通讯 php官方站点提供了sample link:http://jp.php.net/manual/zh/function.fopen.php 2.可以用ajax来刷新页面sample: <?php // HOW TO USE PHP TO WRITE TO YOUR SERIAL PORT: TWO METHODS $serproxy=true; if ($serproxy) { // Use this code in conjunction with SERPROXY.EXE // (http://www.lspace.nildram.co.uk/freeware.html) // which converts a Serial stream to a TCP/IP stream $fp = fsockopen ("localhost", 5331, $errno, $errstr, 30); if (!$fp) { echo "$errstr ($errno)"; } else { $e = chr(27); $string = $e . "A" . $e . "H300"; $string .= $e . "V100" . $e . "XL1SATO"; $string .= $e . "Q1" . $e . "Z"; echo $string; fputs ($fp, $string ); fclose ($fp); } } elseif ($com1) { // Use this code to write directly to the COM1 serial port // First, you want to set the mode of the port. You need to set // it only once; it will remain the same until you reboot. // Note: the backticks on the following line will execute the // DOS 'mode' command from within PHP `mode com1: BAUD=9600 PARITY=N data=8 stop=1 xon=off`; $fp = fopen ("COM1:", "w+"); if (!$fp) { echo "Uh-oh. Port not opened."; } else { $e = chr(27); $string = $e . "A" . $e . "H300"; $string .= $e . "V100" . $e . "XL1SATO"; $string .= $e . "Q1" . $e . "Z"; echo $string; fputs ($fp, $string ); fclose ($fp); } } ?>
php官方站点提供了sample
link:http://jp.php.net/manual/zh/function.fopen.php
2.可以用ajax来刷新页面sample:
<?php
// HOW TO USE PHP TO WRITE TO YOUR SERIAL PORT: TWO METHODS
$serproxy=true;
if ($serproxy) {
// Use this code in conjunction with SERPROXY.EXE
// (http://www.lspace.nildram.co.uk/freeware.html)
// which converts a Serial stream to a TCP/IP stream
$fp = fsockopen ("localhost", 5331, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)";
} else {
$e = chr(27);
$string = $e . "A" . $e . "H300";
$string .= $e . "V100" . $e . "XL1SATO";
$string .= $e . "Q1" . $e . "Z";
echo $string;
fputs ($fp, $string );
fclose ($fp);
}
} elseif ($com1) {
// Use this code to write directly to the COM1 serial port
// First, you want to set the mode of the port. You need to set
// it only once; it will remain the same until you reboot.
// Note: the backticks on the following line will execute the
// DOS 'mode' command from within PHP
`mode com1: BAUD=9600 PARITY=N data=8 stop=1 xon=off`;
$fp = fopen ("COM1:", "w+");
if (!$fp) {
echo "Uh-oh. Port not opened.";
} else {
$e = chr(27);
$string = $e . "A" . $e . "H300";
$string .= $e . "V100" . $e . "XL1SATO";
$string .= $e . "Q1" . $e . "Z";
echo $string;
fputs ($fp, $string );
fclose ($fp);
}
}
?>
2. 用c编写服务在服务器运行,接收串口数据,更新数据库
3. ajax定请求检测数据库,数据更新则返回新数据,完成页面刷新(比如颜色改变、参数值改变)这样的好处就是多处监控只需要在服务器安装一套程序,方便维护。