PHP实现连接设备、通讯和发送命令的方法
这篇文章主要介绍了PHP实现连接设备、通讯和发送命令的方法,涉及php基于socket实现设备连接及数据通信的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了PHP实现连接设备、通讯和发送命令的方法。分享给大家供大家参考。具体如下:
开发的BS架构的软件(PHP),需要跟设备进行通讯,在此记录一下,欢迎各位指正:
1. 采用php socket技术使用TCP/IP连接设备
参数$service_port 连接端口
参数$address 发送IP地址
参数$in 发送命令
function Send_socket_connect($service_port, $address, $in) { //创建 TCP/IP socket$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("could not create socket!"); //设置超时时间 $timeout = 2; $time = time(); //设置非阻塞模式 @socket_set_nonblock($socket); //超时判断 while (!@socket_connect($socket, $address, $service_port)) { $err = socket_last_error($socket); // 连接成功,跳出循环 if ($err === 10056) { break; } //连接失败,判断超时时间,停止 if ((time() - $time) >= $timeout) { socket_close($socket); print('网络异常,请检查网络连接!!'); exit(); } // 刷新频率(250毫秒) usleep(250000); } //设置阻塞模式 @socket_set_block($socket); //发送命令到设备 socket_write($socket, $in, strlen($in)); //关闭连接 socket_close($socket); }
Send_socker_xdcoder $buffer为返回值
function Send_socket_xdcoder($service_port, $address, $in) { //创建 TCP/IP socket $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("could not create socket!"); //设置超时时间 $timeout = 2; $time = time(); //设置非阻塞模式 @socket_set_nonblock($socket); //超时判断 while (!@socket_connect($socket, $address, $service_port)) { $err = socket_last_error($socket); // 连接成功 if ($err === 10056) { break; } //连接失败,判断超时时间,停止 if ((time() - $time) >= $timeout) { socket_close($socket); echo "<script>alert('网络异常,请检查网络连接!!');</script>"; exit(); } // 刷新频率(250毫秒) usleep(250000); } //设置阻塞模式 @socket_set_block($socket); //发送命令到设备 socket_write($socket, $in, strlen($in)); //接收设备命令返回数据 $buffer = socket_read($socket, 1024, PHP_NORMAL_READ); //关闭连接 socket_close($socket); //输出返回值 return $buffer; }
2. 采用php socket技术使用UDP协议连接设备,实现通讯和发送命令
参数$service_port 连接端口
参数$address 发送IP地址
参数$in 发送命令
function Send_socket_connect_udp($service_port, $address, $in) { //采用php socket技术使用UDP协议连接设备 $socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP); @socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, array("sec" => 2, "usec" => 0)); //发送命令 @socket_sendto($socket, $in, strlen($in), 0, $address, $service_port); @socket_recvfrom($socket, $buffer, 1024, MSG_WAITALL, $address, $service_port); //关闭连接 if (empty($buffer)) { echo "<script>alert('网络异常,请检查网络连接!!');</script>"; } }
Send_socket_xdcoder_udp $buffer 为返回值
function Send_socket_xdcoder_udp($service_port, $address, $in) { //采用php socket技术使用UDP协议连接设备 $socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP); @socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, array("sec" => 2, "usec" => 0)); //发送命令 @socket_sendto($socket, $in, strlen($in), 0, $address, $service_port); @socket_recvfrom($socket, $buffer, 1024, MSG_WAITALL, $address, $service_port); //关闭连接 socket_close($socket); if (!empty($buffer)) { return $buffer; } else { echo "<script>alert('网络异常,,请检查网络连接!!');</script>"; } }
3. 采用RS232串口技术连接设备,实现通讯和发送命令
参数$com 串口号
参数$baudratr 波特率
参数$in 发送命令
function rs232_connect($com, $baudrate, $in) { @set_time_limit(10); //使用 'windows下设置窜口参数'; exec("mode " . $com . " BAUD=" . $baudrate . " PARITY=n DATA=8 STOP=1 odsr=off"); // "打开端口串口$com"; $f = @fopen($com, 'w+'); //判断串口是否正常打开 if (!$f) { //echo "<script>alert('Error when open $com!!');</script>"; die("Error when open $com"); } //向串口发送数据; fwrite($f, $in); //关闭端口 fclose($f); //串口操作结束 }
还有一个关于命令16进制转换的:
function hexToStr($hex) { $string = ""; for ($i = 0; $i
希望本文所述对大家的php程序设计有所帮助。

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