TCP/IP

Practical Implementation of MQTT over lwIP: A Combination of IoT Protocols

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Practical Implementation of MQTT over lwIP: A Combination of IoT Protocols

MQTT, as a lightweight publish/subscribe messaging protocol, provides real-time and reliable messaging services for resource-constrained IoT devices in low bandwidth, high latency, or unstable network environments. lwIP, as a similarly lightweight TCP/IP protocol implementation, minimizes the use of hardware resources, especially memory, while providing complete TCP/IP functionality, making lwIP very suitable for small embedded systems. … Read more

NI Modbus Library Overview

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NI Modbus Library Overview

Click the blue text above to follow our public account, where we share a LabVIEW case every day. The NI Modbus Library (ni_lib_modbus_library-1.2.1.42.vip) is a dedicated communication library developed by NI for LabVIEW, based on a modular design concept. It encapsulates the core functionalities of the Modbus protocol, providing engineers with a graphical programming interface … Read more

Detailed Explanation of MODBUS Protocol 6: A Deep Dive into MODBUS TCP/IP

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Detailed Explanation of MODBUS Protocol 6: A Deep Dive into MODBUS TCP/IP

Click to follow and never lose your way in learning! In the previous chapters, we thoroughly explored the MODBUS protocol in serial communication, from basics to applications, and it was quite an exhilarating journey. However, as times progress and technology advances, serial communication, while classic, is like a horse-drawn carriage that cannot keep up with … Read more

A Comprehensive Guide to the ModBus Communication Protocol

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A Comprehensive Guide to the ModBus Communication Protocol

Why does industrial automation need a “language”? With the advent of Industry 4.0, various automated factories have emerged, where different machines collaborate to perform high-intensity tasks with minimal errors. So how do these numerous industrial devices “understand” each other’s language? When a conveyor belt transports materials to a loading point, how does the gripper hear … Read more

Are There Really So Many Vulnerabilities in the TCP/IP Protocol?

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Are There Really So Many Vulnerabilities in the TCP/IP Protocol?

Attention:A gathering place for programmers to relax and share news According to the analysis report of China’s internet network security monitoring data in the first half of 2020, malicious program control servers, denial of service attacks (DDoS), and other network attacks have been on the rise. To this day, network attacks have become one of … Read more

Zero-Basis Embedded System Learning: Creating a Pelt

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Zero-Basis Embedded System Learning: Creating a Pelt

Years ago, the Fisher wrote a post on his birthday about creating an operating system called a marionette. Years have passed, and there has been no progress. There are many reasons for this, which I won’t discuss here. I just want to tell you, dear readers, that the Fisher is not someone who goes back … Read more

In-Depth Analysis of TCP/IP Protocol: The Foundation of Internet Communication

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In-Depth Analysis of TCP/IP Protocol: The Foundation of Internet Communication

TCP/IP (Transmission Control Protocol/Internet Protocol) is the most fundamental protocol of the Internet, forming the basis of the global interconnected network. It consists of two main parts: the IP protocol at the network layer and the TCP protocol at the transport layer. These two protocols work together to ensure that data can be accurately transmitted … Read more

TCP/IP Communication Protocol (2) – LwIP Memory Management

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TCP/IP Communication Protocol (2) - LwIP Memory Management

5. LwIP Memory Management 1. What is Memory Management? (1) Memory management refers to the techniques used for the allocation and utilization of computer memory resources during software execution. Its main purpose is to efficiently and quickly allocate memory and to release and reclaim memory resources at appropriate times (similar to the malloc and free … Read more

TCP/IP Communication Protocol (3) – LwIP Network Interface

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TCP/IP Communication Protocol (3) - LwIP Network Interface

LwIP protocol stack supports various network interfaces (network cards). Since network cards interact directly with the hardware platform, the handling differs based on the hardware. How does LwIP accommodate these different network cards? LwIP provides a unified interface, while the underlying functions need to be implemented by the user, such as initializing the network card, … Read more