php之用php在ubuntu上监听串口

我需要从连接到我的 ubuntu 服务器串行端口的设备获取一些数据，例如实时温度和风速

我也需要向设备发送一些命令 ，为此我找到了一个这样的脚本:

<?php 
$portName = 'com9:'; 
$baudRate = 9600; 
$bits = 8; 
$spotBit = 1; 
header( 'Content-type: text/plain; charset=utf-8' );  
?> 
Serial Port Test 
================ 
<?php 
function echoFlush($string){ 
    echo $string . "\n"; 
    flush(); 
    ob_flush(); 
} 
if(!extension_loaded('dio')){ 
    echoFlush( "PHP Direct IO does not appear to be installed for more info see: http://www.php.net/manual/en/book.dio.php" ); 
    exit; 
} 
try{ 
    //the serial port resource 
    $bbSerialPort; 
    echoFlush(  "Connecting to serial port: {$portName}" ); 
    if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN'){ 
        $bbSerialPort = dio_open($portName, O_RDWR ); 
        //we're on windows configure com port from command line 
        exec("mode {$portName} baud={$baudRate} data={$bits} stop={$spotBit} parity=n xon=on"); 
    }else{ 
        $bbSerialPort = dio_open($portName, O_RDWR | O_NOCTTY | O_NONBLOCK ); 
        dio_fcntl($bbSerialPort, F_SETFL, O_SYNC); 
        //we're on 'nix configure com from php direct io function 
        dio_tcsetattr($bbSerialPort, array( 
            'baud' => $baudRate, 
            'bits' => $bits, 
            'stop'  => $spotBit, 
            'parity' => 0 
        )); 
    } 
    if(!$bbSerialPort){ 
        echoFlush( "Could not open Serial port {$portName} "); 
        exit; 
    } 
    // send data 
    $dataToSend = "HELLO WORLD!"; 
    echoFlush( "Writing to serial port data: \"{$dataToSend}\"" ); 
    $bytesSent = dio_write($bbSerialPort, $dataToSend ); 
    echoFlush( "Sent: {$bytesSent} bytes" ); 
    //date_default_timezone_set ("Europe/London"); 
    $runForSeconds = new DateInterval("PT10S"); //10 seconds 
    $endTime = (new DateTime())->add($runForSeconds); 
    echoFlush(  "Waiting for {$runForSeconds->format('%S')} seconds to recieve data on serial port" ); 
    while (new DateTime() < $endTime) { 
        $data = dio_read($bbSerialPort, 256); //this is a blocking call 
        if ($data){ 
            echoFlush(  "Data Recieved: ". $data ); 
        } 
    } 
    echoFlush(  "Closing Port" ); 
    dio_close($bbSerialPort); 
}  
catch (Exception $e){ 
    echoFlush(  $e->getMessage() ); 
    exit(1); 
} 
?> 

这将向串口发送命令并从串口读取任何更新

但是我需要随时监听端口 我的意思是每一秒我都会收到来自设备的任何更新，我必须拥有它，我等不及下一个更新周期了

有没有什么方法可以实时监听端口，或者我必须用 c o python 为我的 Apache 网络服务器编写一个包装器？

请您参考如下方法:

is there any way for real time port listening or i must write a wrapper with c o python for my Apache web-server?

实际上是的，最好用 c 或 python 为这样的工作编写一个包装器。 python 有很好的工具来处理监听端口所需的异常

完整信息见链接: Full examples of using pySerial package