Imagine coming home from work to find the lights automatically turned on, the air conditioning set to the most comfortable temperature, and your phone alerting you with a message saying “Living Room Temperature 26 ℃”. This is not magic, but rather the “group chat” completed in a second by MQTT—sensors act like chatterboxes, throwing data … Read more
Command Description Basic AT Commands ATI displays the MT ID information AT+CIMI queries the IMSI AT+QCCID queries the ICCID AT+CSQ queries the signal strength AT+CGATT? queries the current PS domain status MQTT Configuration Commands AT+QMTCFG configures MQTT optional parameters AT+QMTCFG configures MQTT optional parameters. AT+QMTOPEN opens the MQTT client network AT+QMTCLOSE closes the MQTT client … Read more
Building an Efficient MQTT Cluster System 🌐 Introduction 🧭 In modern distributed systems, the clustered deployment of MQTT Brokers is a key method to enhance system availability ✅, scalability 🔋, and load balancing capabilities 🔄. The <span>cluster-plugin</span> of smart-mqtt implements an efficient and scalable cluster coordination system 🌟 by combining the HTTP client of the … Read more
What is MQTT? In the world of the Internet of Things (IoT), devices need to communicate with each other. They share data such as temperature, speed, or light levels. One protocol that facilitates this communication simply and efficiently is MQTT. MQTT stands for Message Queuing Telemetry Transport. It was designed for small devices with limited … Read more
1. Basic Principles Commandment 1: Minimum Version Declaration cmake_minimum_required(VERSION 3.21) # Requires support for Qt6's AUX_SOURCE_DIRECTORY improvementproject(MyApp VERSION 1.2.3 LANGUAGES CXX) Commandment 2: Strict Policy Configuration # Enforce interface compatibility checks cmake_policy(SET CMP0063 NEW) # Target link library order cmake_policy(SET CMP0079 NEW) # Target import file generation 2. Qt Integration Standards Commandment 3: Modular Qt … Read more
AuthorForum Account: wshuo 1. Introduction My family lives in a rural area in Northeast China, where winters are very cold. We bought a boiler that requires a circulation pump. Simply put, when the boiler water is heated, the circulation pump automatically turns on, delivering hot water to the heating system. As hot water is drawn … Read more
Author: EMQX Team Original: https://www.emqx.com/zh/blog/mqtt-vs-amqp-for-iot-communications Table of Contents The Importance of Message Queue Protocols in IoT and Distributed Systems What is MQTT? What is AMQP? Detailed Comparison of MQTT and AMQP Factors to Consider When Choosing MQTT and AMQP Implementing Large-Scale MQTT Scenarios with EMQX With the rapid development of the Internet of Things (IoT), … Read more
1. Experiment Objectives (1) Understand the basic principles of the MQTT protocol (2) Master the use of MQTT clients 2. Experiment Environment Required equipment for the experiment: (1) One device (2) One PC host (3) One network cable (Connect Host A to the device management network port) 3. Experiment Configuration (1) Operating System: Host A … Read more
Follow+Star Public Account, don’t miss out on exciting content Source | Embedded Miscellaneous In the past decade, the Internet of Things (IoT) has been developing rapidly, and in many scenarios, networking is essential. Both MQTT and HTTP are used in IoT applications, but their application scenarios differ. In IoT applications, MQTT (Message Queuing Telemetry Transport) … Read more
Introduction This content is an important chapter in the STM32 FreeRTOS smart home project. Through this content, you will master IoT applications based on the ESP8266 Wi-Fi module with STM32. The cloud platform used in this session is Alibaba Cloud. This lays the foundation for subsequent hardware control through an app designed with Android Studio. … Read more