php服务端,下发消息到设备

<?php
header("Content-Type: text/html; charset=utf-8");
include_once './aliyun-openapi-php-sdk/aliyun-php-sdk-core/Config.php';
use \Iot\Request\V20170420 as Iot;

//设置你的AccessKeyId,AccessSecret,ProductKey,
    $accessKeyId = "";
    $accessSecret = "";
    $ProductKey='';
    
    // 这俩传过来就行
    $deviceName='';
    $DeviceSecret="";
    
    $iClientProfile = DefaultProfile::getProfile("cn-shanghai", $accessKeyId, $accessSecret);
    $client = new DefaultAcsClient($iClientProfile);
    
    // 发布消息到设备并同步返回数据
    // 文档: https://help.aliyun.com/document_detail/57241.html?spm=5176.doc57166.2.6.9sc6US

    function sendMsg($msg,$callback){
        global $client;
        global $ProductKey;
        global $deviceName;
        global $DeviceSecret;

        $request = new Iot\RRpcRequest();
        $request->setProductKey($ProductKey);
        $request->setDeviceName($deviceName);
        $request->setRequestBase64Byte(base64_encode($msg));
        $request->setTimeout(1000);
        $response =$client->getAcsResponse($request);
        // print_r(json_encode($response));
        //返回格式:{"MessageId":1,"RequestId":"123","PayloadBase64Byte":"base64格式","Success":true,"RrpcCode":"SUCCESS"}

        if($response&&$response->Success==true){
            $callback(json_decode(base64_decode($response->PayloadBase64Byte)));
        }else{
            // 返回错误消息
            echo '{"errno":-1,"msg":"获取消息失败"}';
        }
    }
    sendMsg('{"act":1,"channel":1,"Sn":1}',function($data){
                print_f($data);
    });
?>

node模拟设备端

var mqtt = require('mqtt');
var crypto = require('crypto'); //加密模块
var device = {
    name: "",
    secret: ''
};
var timestamp = Date.now(); //时间戳
var obj = {
    productKey: '', //一个项目只有一个
    deviceName: device.name, //需要服务端 单独/批量 注册到阿里云，
    clientId: device.name, //客户端自表示Id,64字符内，建议是MAC或SN
    timestamp: timestamp //时间戳
};

//---------以下部分生成sign---------------------//

var hmac = crypto.createHmac('sha1', device.secret.toString('ascii'));

function signFn(objs) {
    var arr = [];
    var str = '';
    for (const key in objs) {
        if (objs.hasOwnProperty(key)) {
            arr.push(key);
        }
    }
    arr.sort(); //按字母排序
    arr.map(function (d) {
        str += (d + objs[d]); //拼接为:keyvaluekeyvalue
    });
    hmac.update(encodeURI(str)); //添加需要的加密数据
    return hmac.digest('hex'); //加密,(hex表示16进制)
}
var sign = signFn(obj);

//------以下部分连接mqtt-----------------------------//

var client = mqtt.connect(`mqtt://${obj.productKey}.iot-as-mqtt.cn-shanghai.aliyuncs.com:1883`, {
    username: obj.deviceName + "&" + obj.productKey,
    password: sign,
    clientId: `${obj.clientId}|securemode=3,signmethod=hmacsha1,timestamp=${timestamp}|` //TCP直连模式hmacsha1加密
});

client.on('connect', function () {
    client.subscribe(`/sys/${obj.productKey}/${obj.deviceName}/rrpc/request/+`);//+号是通配符,表示消息id
    console.log('连接');
});

client.on('message', function (topic, message) {
    var msg = JSON.parse(message.toString());//  message 是 Buffer
    var msgId = topic.split('/').pop(); //需要从取topic中的消息id
    
    console.log('topic:', topic);
    console.log('消息id:', msgId);
    console.log('消息:',message.toString());
    
        var json=JSON.stringify({
            "act":3,
             "channel":msg.channel,
             "result":0,
             "Sn":12345
        });
        // 发布,消息id是变化的
        client.publish(`/sys/${obj.productKey}/${obj.deviceName}/rrpc/response/${msgId}`, json);

});