物联网平台协议学习笔记的相关内容

阿里云文档 2024-07-22

MQTT协议保留消息的概念、交互过程及使用场景

保留消息用于确保新订阅Topic的设备能及时收到最新状态的消息，即使消息在设备订阅之前发布。服务端向Topic发布消息时，如果消息携带保留标记（Reatin），物联网平台将会保存这个消息并实时发布给订阅者，后续订阅该Topic的设备都会收到保留消息。保留消息在MQTT 3.1.1标准中就已定义，阿里云物联网平台在MQTT 5.0接入时支持这个特性。本文为您介绍保留消息的概念、交互过程和使用场景。

阿里云文档 2023-12-13

MQTT协议遗嘱消息的概念、交互过程及使用场景

MQTT协议的遗嘱消息，用于在设备离线时向其他设备告知其已离线。如果设备异常断开且在一段时间内未重连，物联网平台会代为发送遗嘱消息。遗嘱消息在MQTT 3.1.1标准中已定义，阿里云物联网平台在MQTT 5.0接入时支持这个特性。本文为您介绍遗嘱消息的概念、交互过程及使用场景。

阿里云文档 2023-12-08

云网关协议SL 651的通信消息格式

对于SL 651协议云网关设备，设备上下线、上报数据消息，可通过物联网平台消息转发的云产品流转功能转发到服务端（用户的服务器）。设备上报数据消息可通过消息转发的AMQP订阅功能推送至服务端。本文介绍消息转发的使用说明，及对应消息的Topic和数据格式。

阿里云文档 2023-12-08

SL651协议概念及特性

SL 651是国家水文局制定的用于水文监测数据通信的协议，它规定了水文监测数据采集与传输的格式、内容、传输方式等技术参数，支持通过TCP（安全性低，不推荐）和TLS两种方式接入设备。

阿里云文档 2023-11-09

如何添加GB/T32960协议云网关产品

若您使用GB/T 32960协议云网关将车辆设备接入物联网平台，需通过添加云网关创建对应产品。本文介绍添加GB/T 32960协议云网关产品的具体步骤。

文章 2022-10-30 来自：开发者社区

阿里云物联网平台 Alink 协议简介 | 学习笔记

开发者学堂课程【物联网平台开发全栈教程：阿里云物联网平台 Alink 协议简介】学习笔记，与课程紧密联系，让用户快速学习知识。课程地址：https://developer.aliyun.com/learning/course/562/detail/7695阿里云物联网平台 Alink 协议简介内容介绍一、基于 Ainki 协议开发二、物模...

文章 2022-10-29 来自：开发者社区

从物联网需求到MQTT协议（中）|学习笔记

开发者学堂课程【大咖带你聊物联网：从物联网需求到MQTT协议（中）】学习笔记，与课程紧密联系，让用户快速学习知识。课程地址：https://developer.aliyun.com/learning/course/571/detail/7778从物联网需求到 MQTT 协议（中）一、...

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