Read the latest documents and participate in:【Find Errors in Documents to Win Prizes】 Activity The latest document content of this article can be found at: https://docs.openluat.com/air780e/at/app/command/http 1. Overview of AT Commands AT commands are an ancient method of communication that has been in use since wired communication. As of 2024, it has a history of … Read more
MQTT (Message Queuing Telemetry Transport) and EMQX are two widely used communication technologies in the Internet of Things (IoT) and messaging systems. Although both are used for real-time communication and data transmission, there are some notable differences in their design, functionality, and features. This article will detail the differences between MQTT and EMQX, including protocol … Read more
MQTT: IoT Device Communication Protocol Stack Around us, more and more smart devices are quietly changing our lives. Have you ever wondered what happens behind the scenes when you use a mobile app to turn on the smart bulb at home? Today, let’s explore the “delivery guy” of communication between IoT devices – the MQTT … Read more
Basic Definition The full name of the MQTT protocol is (Message Queuing Telemetry Transport), which is a lightweight communication protocol based on the publish/subscribe model. Many textual descriptions of the MQTT protocol can be found online: it is a lightweight communication protocol based on the Publish/Subscribe model and built on top of the TCP/IP protocol. … Read more
MQTT: The Best Companion for IoT Messaging Hello everyone! Today I want to talk to you about a very important communication protocol in the field of IoT — MQTT. As a lightweight messaging protocol, MQTT is particularly suitable for IoT applications that require low bandwidth and have unstable networks. Whether it’s smart homes, industrial monitoring, … Read more
Is the Internet of Things hot? I think it is. In fact, the Internet of Things has unconsciously integrated into our lives, bringing us convenience, such as smart locks, ETC electronic toll collection systems, etc. At first, everyone felt it was quite novel, but now it has become commonplace. It can be said that the … Read more
Introduction: Want to quickly set up a reliable messaging hub for smart hardware and industrial IoT? Apache Artemis is not only the successor to ActiveMQ but also the hidden MQTT Protocol King! It supports millions of device connections with millisecond latency. Today, I will guide you step-by-step to deploy your dedicated MQTT Broker, and at … Read more
1. What Is MQTT Protocol The full name of MQTT protocol is Message Queuing Telemetry Transport, translated as Message Queue Telemetry Transport. It is a message protocol based on the publish-subscribe model under ISO standards, based on the TCP/IP protocol suite, designed to improve the performance of network device hardware and the network itself. MQTT … Read more
13.8 Modbus TCP Server Development Source code: After extraction, the source code is “modbus_server_tcp.c”, which simulates a Modbus TCP sensor. For an explanation of the source code, please refer to “11.7 Modbus TCP Programming and Experimentation”. When the front-end program and the MQTT program use the RPC interface to read and write the Modbus TCP … Read more
Modbus–The Common Language of Industrial Communication Why Do We Need Modbus? —— How the Common Language of Industrial Communication Ends the “Babel Tower Dilemma” 1. The Era Before Modbus: The “Babel Tower Dilemma” of Industrial Communication In the factory workshops of the 1970s, the dialogue between equipment was like a chaotic “Babel Tower”: Device A … Read more