The previous article introduced MQTT, but it felt like something was missing, so here is a complete overview. The Origin of MQTT Background: In the late 1990s, polling mechanisms were commonly used in the industrial control field to collect device data, but this method was inefficient and placed a high load on the network. At … Read more
The concept of the digital economy is now familiar to us, whether in traditional manufacturing or the streaming era. However, why are many companies in the industrial manufacturing sector still not implementing digitalization? This is certainly related to the owners’ understanding of it and their lack of deep comprehension of how it can generate actual … Read more
The core of Industry 4.0 is the Industrial Internet of Things (IIoT), which enables factories to connect machines, sensors, robots, and other devices to the internet and to each other. When implementing IIoT, selecting the right communication standard that meets the needs of Industry 4.0 is a key challenge. MQTT Sparkplug is a communication protocol … Read more
MQTT is a widely used messaging protocol in IoT projects, utilizing a publish–subscribe model for message communication. Below, we will demonstrate how to implement publishing–subscribe message data to an MQTT server using Java. First, include the pom dependency: <dependency> <groupId>org.eclipse.paho</groupId> <artifactId>org.eclipse.paho.client.mqttv3</artifactId> <version>1.2.5</version></dependency> Publish a JSON message to vehicle/monitor/{userId} as shown in the demo below: public … Read more
Introduction to Opto22 50 years focused on the forefront of global automation technology Founding member of the OPC UA protocol Released the world’s first edge programmable industrial controller in 2018 The only automation equipment manufacturer that offers a lifetime warranty on I/O modules Application of MQTT Protocol & SparkPlug Specification in Industrial IoTOpto22What is MQTT … Read more
The technical sharing related to MQTT will come to a close, and updates on the latest developments regarding MQTT will be provided periodically. Of course, if there are any aspects of MQTT that have not been thoroughly covered or if you have better suggestions, feel free to leave a comment. We will normally supplement based … Read more
Hello everyone! Today, we will discuss one of the most commonly used communication protocols in the Internet of Things (IoT) — the MQTT protocol. I will explain this seemingly professional technical concept in the simplest way possible. What is MQTT? MQTT (Message Queuing Telemetry Transport) is like a “WeChat” system specifically designed for IoT devices. … Read more
Today, I would like to share a question from a follower: I am currently in my third year of a master’s program at a 211 university and have received an offer for C++ desktop application development. I plan to work in this position for a maximum of 3 to 4 years, after which I want … Read more
Mind+ has an “extension” called “Network Services” that includes an “MQTT” module, which allows devices to communicate using the MQTT protocol.Using this, you can simulate the publisher and subscriber in the IoT MQTT protocol with Mind+.The method is as follows:1. SIot (for Teacher’s Machine)1. Download and unzip the SIot software:https://mindplus.dfrobot.com.cn/siot2. Double-click to runSIoT_windows_1_2.exe, which will … Read more
Background of the Issue When sending form data using HTTP POST, if the data is sent as a string connected by <span>&</span> (i.e., in <span>application/x-www-form-urlencoded</span> format), there often occurs a garbled text issue when the data contains Chinese characters. This is because Chinese characters are non-ASCII characters and need to be properly encoded to be … Read more