In today’s world where digitalization is sweeping across the globe, the demand for data is as urgent for enterprises as the need for air and water. To stand out in fierce market competition, companies must extract value from vast amounts of industrial data to enhance their competitiveness. This requires a powerful platform that can seamlessly … Read more
A tutorial on deploying MQTT on Windows 10 has been shared on the cloud drive. If you’re interested, you can learn from it. Just find an old computer to use as a server and let it run continuously. Thanks to 【のノоп蔩袢】 for taking the time to organize the tutorial and installation package. Download the entire … Read more
Robot Technology communication and secondary development, please follow our public account. This public account provides a platform for robot application technology exchange, currently supporting mainstream KUKA, ABB, and UR robots. For details, please leave a message in the backend. SasApps Official Website:http://www.sassapps.cn/Public Account Download Link: In addition to using the API to obtain KRC file … Read more
Introduction In industrial automation, communication between devices is one of the core issues. Traditional PLC communication often uses protocols like Modbus, but with the rise of the Internet of Things (IoT), MQTT (Message Queuing Telemetry Transport) has gradually become a popular choice in the industrial field due to its lightweight, efficient, and cross-platform characteristics. Today, … Read more
13.6.5 MQTT Testing Program Lab Experiment Place mqtt_test and paho.mqtt.c.tar.bz2 in the same directory on Ubuntu. 1. Compile the Paho Library Execute the following commands in Ubuntu: Swipe left or right to view the full content $ tar xjf paho.mqtt.c.tar.bz2 $ cd paho.mqtt.c Edit CMakeLists.txt and add the following content at the top: Swipe left … Read more
1. Download the installation package curl -s https://assets.emqx.com/scripts/install-emqx-rpm.sh | sudo bash Edit 2. Install yum install emqx -y Edit 3. Start the service systemctl start emqx Edit 4. Access the console Edit The default username and password are: admin/public After logging in, be sure to change the default password 5. Test Edit The above image … Read more
Introduction In unstable network environments, using the TCP transport protocol, MQTT may face challenges in ensuring reliable communication. To address this issue, MQTT introduces a QoS mechanism that provides various message interaction options to meet specific requirements for reliable message delivery in different scenarios. In this article, we will explore the QoS levels 0, 1, … Read more
Original: https://www.cnblogs.com/3echo/p/11612560.html The Internet of Things (IoT) is not just a new technology, but also an integration with old technologies, where communication is key. Various communication methods differ, but various protocols play a vital role in connecting vast numbers of “things” to the internet.This article introduces two complementary IoT protocols: the local protocol Modbus for … Read more
Click on the above “Mechanical and Electronic Engineering Technology” to follow usQGraphicsView is a widget in the Qt framework used to display graphical items in a QGraphicsScene. It provides a flexible canvas that can be zoomed, scrolled, and panned to view different parts of the scene. Header File #include <QGraphicsView> Constructor QGraphicsView::QGraphicsView(QWidget *parent = nullptr)QGraphicsView::QGraphicsView(QGraphicsScene … Read more
When learning about the Internet of Things, the first thing that comes to mind is the ESP8266. This module can connect to the internet, allowing it to connect to your home router or act as a hotspot for your phone to connect to. Isn’t that fascinating? Although the programming and related products for this device … Read more