AsyncMQTT Articles - Page 6 of 28

QT C++ Attractive Interface – Custom Image Switch Control

2026-05-25 by boardor

The implementation effect is as follows: 🧩 Function Overview 1. Switch State Control Supports two states: On (checked) and Off (unchecked). Can toggle state by clicking. Supports immediate state setting without animation (setChecked) and state switching with animation (setCheckedWithAnimation). 2. Multiple Built-in Styles Provides three built-in styles (ButtonStyleOne, ButtonStyleTwo, ButtonStyleThree), each style uses different switch … Read more

BACnet to MQTT – ADFWEB Gateway Converter

2026-05-24 by boardor

BACnet to MQTT—ADFWEB Gateway Converter–Guangzhou Xinyu IoT Author:www.adfweb.com.cn Zou Wuyi Mobile185-020-77899 Email: [email protected] 1 Features: HD67938-B2 is aBACnet slave device/ MQTT converter, with the following features: – Can be installed on a 35mm DIN rail; – Wide power input range: 18…35V DC and 8…24V AC; – Wide operating temperature range:-40°C to 85°C (-40°F to +185°F). … Read more

Example of Using QTreeWidget in QT C++

2026-05-24 by boardor

1. What is QTreeWidget? QTreeWidget is a very important and commonly used widget in the Qt framework, used to display and edit item data in a tree structure (Tree Structure). It is a high-level, user-friendly wrapper around QTreeView, similar to QListWidget and QTableWidget, providing a convenient item-based interface without the need to manually create a … Read more

Data Acquisition of Industrial PLCs Combined with MQTT Protocol

2026-05-22 by boardor

Driven by the wave of digitalization, the Internet of Things (IoT) is uniquely transforming the landscape of industrial automation. Among these changes, the MQTT protocol plays a crucial role in this revolution due to its lightweight and efficient nature. Data acquisition and protocol parsing from PLCs (Programmable Logic Controllers) are key technologies in the field … Read more

Setting Up an MQTT Server Using Docker Compose

2026-05-22 by boardor

MQTT High-Frequency Q&A: A Development Guide to Avoid Pitfalls

2026-05-22 by boardor

In IoT development, the MQTT protocol has become the “golden partner” for devices to connect to the cloud due to its lightweight nature, low bandwidth consumption, and efficient communication. However, in practical applications, developers often encounter issues such as connection management, protocol compatibility, and low power optimization. Newcomers may also struggle with practical operations regarding … Read more

Full Commitment! Practical AIoT Rock-Paper-Scissors Recognition System Based on RT-Thread and Renesas VisionBoard | Technical Assembly

2026-05-21 by boardor

The title of this project is: Rock-Paper-Scissors Gesture Recognition. This project implements basic gesture recognition for rock-paper-scissors, compares the recognized results with the gestures stored in the machine, controls the servo’s behavior based on the results, and synchronizes the recognized results to the host computer. Table of Contents Project Overview Hardware List Servo Control Pins … Read more

NanoMQ: An Ultra-Lightweight and High-Performance MQTT Edge Messaging Platform

2026-05-20 by boardor

The rapid development of the Internet of Things (IoT) and Industrial Internet of Things (IIoT) has raised higher demands for messaging middleware: lightweight, high-performance, low-latency, and easy deployment. NanoMQ is an MQTT message broker that meets these requirements, being a high-performance, lightweight MQTT edge messaging platform based on NNG, particularly suitable for resource-constrained embedded devices … Read more

Essential Local MQTT Server for Testing

2026-05-18 by boardor

In embedded IoT development, the MQTT protocol has become the standard choice for communication between devices. Why do you need a local MQTT server? • Development Testing Isolation: Avoid impacting the production environment and provide a secure testing space. • Network Independence: Does not rely on external network connections, ensuring a stable development environment. • … Read more