使用PHP的Linux托管服务器的串行COM端口问题 [英] Serial COM port issue with linux hosting server using PHP

问题描述

// Change Parms on Comport: Linux: Windows
$command = (PHP_OS == 'Linux') ? 'mode /dev/ttyS1: BAUD=9600 PARITY=N data=8 stop=1 XON=off TO=on' : 'mode COM1: BAUD=9600 PARITY=N data=8 stop=1 XON=off TO=on';

system($command, $retVar);    

if($retVar == '127'){
    echo("Command not found:$command<br>");
    // May want to exit here.
}

//Create the resource id:  Linux: Windows
$path = (PHP_OS == 'Linux') ? '/dev/ttyS1' : 'COM1';
$fp = fopen($path, 'r+');

if(!$fp){ 
  echo"Port not accessible";
  exit();
} else {
  echo"Port COM1 opened successfully";
}

//Read from port:
$buffer = fgets($fp);

echo "<br>Data read from buffer: $buffer";

我尝试过：



因为我无法通过引用Linux服务器和Windows服务器来访问COM端口值。所以我可以通过引用Linux和Linux来解释所有需要设置的内容。 Windows Server。由于以下代码在localhost中正常工作。



因为我收到以下错误 -

命令未找到：mode / dev / ttyS1：BAUD = 9600 PARITY = N data = 8 stop = 1 XON = off TO = on

端口无法访问

What I have tried:

As I am not able access the COM port Value with references to Linux Server and windows server.So explain me what all setting need to made with references to Linux & windows Server.As this below code is working properly in localhost.

As I am getting the following error-
Command Not found:mode /dev/ttyS1: BAUD=9600 PARITY=N data=8 stop=1 XON=off TO=on
Port not accessible

推荐答案

command =（PHP_OS == ' Linux'）？ ' mode / dev / ttyS1：BAUD = 9600 PARITY = N data = 8 stop = 1 XON = off TO = on' ：' 模式COM1：BAUD = 9600 PARITY = N data = 8 stop = 1 XON = off TO =上';

system（

command = (PHP_OS == 'Linux') ? 'mode /dev/ttyS1: BAUD=9600 PARITY=N data=8 stop=1 XON=off TO=on' : 'mode COM1: BAUD=9600 PARITY=N data=8 stop=1 XON=off TO=on'; system(

命令，

retVar）;

if（

retVar); if(

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