jucai/public/test.php

<?php

use Swoole\Coroutine\Client;
use function Swoole\Coroutine\run;

run(function () {
    $client = new Client(SWOOLE_SOCK_TCP);
    if (!$client->connect('10.10.10.150', 8131, 0.5))
    {
        echo "connect failed. Error: {$client->errCode}\n";
    }
    $data = [
        'cmd' =>"getsn",
        'id' => '22'
    ];

    $client->send("VZ00".json_encode($data));
    print_r($client->recv());
    $client->close();
});