mqtt

系统版本centos7 X64 1.设置保存安装包路径 # cd /usr/local/src 2、开始下载源包 官网资源： https://mosquitto.org/files/source/ # wget https://mosquitto.org/files/source/mosquitto-1.6.7.tar.gz 3、解压 解压后得到mosquitto-1.6.7文件目录 # tar zxvf mosquitto-1.6.7.tar.gz# mv mosquitto-1.6.7 /usr/local/mosquitto-1.6.7 4、安装MQTT运行依赖环境 1） 以下三个必须安装，不然make时无法通过。 另外安装MQTT之前，我们也可以# cat compiling.txt文件阅读一下官方的说明。 # yum -y install openssl-devel # yum -y install gcc-c++ # yum -y install cmake 2） 以下可选扩展功能，不安装也不影响MQTT使用，只是缺少部分对应的功能 c-ares（用于DNS-SRV支持，默认禁用）c-ares官网： http://c-ares.haxx.se tcp-wrappers（可选，包名libwrapp0 dev） lib-uuid（支持为每个连接客户端生成唯一uuid）

访问密钥AccessKey（AK）相当于登录密码，只是使用场景不同。 AccessKey用于程序方式调用云服务API，而登录密码用于登录控制台。 如果您不需要调用API，那么就不需要创建AccessKey。 来源： https://www.cnblogs.com/abdusalam10/p/11972102.html

I have been trying to connect my android application to AWS IoT portal. I have created an IAM account, which has a username and password. I have gone through the documentation but I could not see any proper guideline. I read somewhere that I can access the IoT devices through IAM/Cognito/using a certificate. Since I am an Android user I can't(I don't want to) use a device certificate. Can I use my IAM credentials to access my AWS IoT devices? I have downloaded all sample application and I could not find any working code. Or could someone explain how can I access AWS IoT portal from android app

The low reliability of GCM on Android is such that I have moved to another service to handle push messages: Pushy, ( https://pushy.me/ ) The service relies on MQTT, and from my experience as well as many other reviews, the real time feature-set holds up to its name and rarely does a message get dropped. However, contacting support, they noted that there is no iOS integration and only support Android. I have searched widely but have not found a suitable replacement for iOS that supports MQTT out of the box. Is there such a service available to allow for more dependable push messages? The

My both publisher and subscriber are both connected to mosquitto (paho) broker with QOS=2 and maintaining persistent session by clean_session=false. When i publish message with subscriber connected to broker, it successfully received by subscriber, now if I disconnect the subscriber , then again publish message and connect subscriber after, I will be able to retrieve message those messages when my subscriber was offline. My question is -- Is there any storage in the broker which stores all the messages when subscriber is offline. If yes, how much long or how many message it can store. Is this

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I am getting "java.io.eof" exception,when i am trying to subscribe mqtt client. I am using eclipse paho library and using mosquitto broker. I am not getting any answer of this,so please help me why this happens ? Mqtt connection and subscribe I am using this code for connecting and subscribing to mosquitto private void buildClient(String clientId){ log.debug("Connecting... "+clientId); try { mqttClient = new MqttClient(envConfiguration.getBrokerUrl(), clientId,new MemoryPersistence()); System.out.println(mqttClient.isConnected()); } catch (MqttException e) { log.debug("build client stopped due