PHP 및 Modbus TCP: 데이터 처리 및 전송 방법 최적화

<?php
// 配置Modbus TCP设备的IP地址和端口号
$host = '192.168.0.1';
$port = 502;

// 创建Socket连接
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$result = socket_connect($socket, $host, $port);

if ($result === false) {
    echo "无法连接到Modbus设备";
    exit;
}

// 发送和接收数据
$sendData = '010300010001';
socket_write($socket, hex2bin($sendData), strlen(hex2bin($sendData)));

$recvData = socket_read($socket, 1024);
echo "接收到的数据：" . bin2hex($recvData);

// 关闭Socket连接
socket_close($socket);
?>

// 批量读取寄存器
$sendData = '010300010002';
socket_write($socket, hex2bin($sendData), strlen(hex2bin($sendData)));

$recvData = socket_read($socket, 1024);
echo "接收到的数据：" . bin2hex($recvData);

// 创建数据缓冲区
$dataBuffer = '';

// 循环接收数据
while (true) {
    $recvData = socket_read($socket, 1024);
    
    if ($recvData === '') {
        break;
    }
    
    $dataBuffer .= $recvData;
}

echo "接收到的数据：" . bin2hex($dataBuffer);

// 设置超时时间
socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, array('sec' => 1, 'usec' => 0));

// 检查连接是否断开
$sendData = '010300010001';
socket_write($socket, hex2bin($sendData), strlen(hex2bin($sendData)));

if (socket_last_error($socket) === SOCKET_EPIPE) {
    echo "Modbus设备连接已断开";
    exit;
}

$recvData = socket_read($socket, 1024);
echo "接收到的数据：" . bin2hex($recvData);