PHPMQTT v1.2.1 版本发布，MQTT 协议解析 & 协程客户端

Simps\MQTT\Protocol::pack(array $array)
Simps\MQTT\ProtocolV5::pack(array $array)
Simps\MQTT\ProtocolInterface::MQTT_PROTOCOL_LEVEL_3_1;

Simps\MQTT\Types::CONNECT;

Simps\MQTT\Protocol\V3::pack(array $array)
Simps\MQTT\Protocol\V5::pack(array $array)
Simps\MQTT\Protocol\ProtocolInterface::MQTT_PROTOCOL_LEVEL_3_1;

Simps\MQTT\Protocol\Types::CONNECT;

use Simps\MQTT\Client;

$config = [
    'host' => '127.0.0.1',
    'port' => 1883,
    'user_name' => '',
    'password' => '',
    'client_id' => Client::genClientID(),
    'keep_alive' => 10,
];
$swooleConfig = [
    'open_mqtt_protocol' => true,
    'package_max_length' => 2 * 1024 * 1024,
    'connect_timeout' => 1.0,
    'write_timeout' => 3.0,
    'read_timeout' => 0.5,
];
$client = new Client($config, $swooleConfig);

use Simps\MQTT\Client;
use Simps\MQTT\Config\ClientConfig;

$config = new ClientConfig();
$config->setUserName('')
    ->setPassword('')
    ->setClientId(Client::genClientID())
    ->setKeepAlive(10);

$swooleConfig = [
    'open_mqtt_protocol' => true,
    'package_max_length' => 2 * 1024 * 1024,
    'connect_timeout' => 1.0,
    'write_timeout' => 3.0,
    'read_timeout' => 0.5,
];
$config->setSwooleConfig($swooleConfig);
$client = new Client('127.0.0.1', 1883, $config);

// 也可以这样设置
$config = new ClientConfig([
    'userName' => '',
    'password' => '',
    'clientId' => '',
    'keepAlive' => 10,
    'protocolName' => 'MQTT',
    'protocolLevel' => 4,
    'properties' => [],
    'delay' => 3000, // 3s
    'swooleConfig' => []
]);
$client = new Client('127.0.0.1', 1883, $config);