如何实现PHP调用物联网设备接口_PHP物联网设备(MQTT/CoAP)接口调用教程

require 'vendor/autoload.php';

use PhpMqtt\Client\MQTTClient;
use PhpMqtt\Client\ConnectionSettings;

$server   = 'broker.hivemq.com'; // MQTT 服务器地址
$port     = 1883;                // 端口
$clientId = 'php_client_1';
$username = '';                  // 可选认证
$password = '';

$mqtt = new MQTTClient($server, $port, $clientId);
$connectionSettings = (new ConnectionSettings)
    ->setUsername($username)
    ->setPassword($password);

$mqtt->connect($connectionSettings);

// 向设备发送控制命令
$topic = 'device/light/control';
$payload = json_encode(['command' => 'on', 'brightness' => 80]);
$mqtt->publish($topic, $payload, 0, true);

echo "指令已发送：$payload\n";

$mqtt->disconnect();

$mqtt->connect($connectionSettings);
$mqtt->subscribe('device/sensor/temperature', function ($topic, $message) {
    echo "收到温度数据 [$topic]: $message\n";
    $data = json_decode($message, true);
    // 处理数据，例如存入数据库
}, 0);

// 持续监听
while ($mqtt->loop(true)) {
    usleep(100000); // 休眠 0.1 秒
}

$uri = 'coap://[设备IP]:5683/sensors/temperature';
$result = shell_exec("coap get $uri");
echo "CoAP 响应: $result";