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
-Begin- Hello everyone, I am Engineer Fu. Recently, many beginners interested in host computer communication have been following us. I always advise everyone that when learning host computer communication, it is essential to start with the Modbus protocol. Once you understand the Modbus protocol, other protocols are quite similar. Today, I want to share with … Read more
ZigBee is one of the most important wireless protocols in wireless communication, widely used in various IoT communication fields. The success of ZigBee technology in IoT applications is inseparable from its powerful networking capabilities. In this article, we will explore the network types of ZigBee. ZigBee Network Device TypesZigBee defines two types of devices to … Read more
Introduction Click the “Shenzhen Network and Information Security Industry Association” official account below to follow and set it as aStarred. Reply in the background with [Technical] to apply for joining the technical exchange group in the network security industry. OSI and TCP/IP are very basic yet extremely important knowledge; many knowledge points are interconnected based … Read more
1. Overview of Computer Networks 1.1 Classification of Computer Networks Based on the scope of the network: Wide Area Network (WAN), Metropolitan Area Network (MAN), Local Area Network (LAN); Based on the users of the network: Public networks, Private networks. 1.2 Hierarchical Structure of Computer Networks Comparison of the TCP/IP four-layer model and the OSI … Read more
Definition of LIN Bus LIN (Local Interconnect Network) is a low-cost serial communication network designed for distributed electronic systems in automobiles. The main function of LIN is to provide auxiliary functionality for CAN bus networks, used in places like body electronic components (such as windows, mirrors, headlights, wipers, etc.). It is suitable for applications that … Read more
In the field of CAN, aside from functional interaction and communication matrix design control, there is also the low-level testing of CAN, which mainly includes aspects such as CAN hardware, protocol stack, and software. As automotive manufacturers and suppliers, we often focus on functional design implementation and the signal interactions related to functional implementation; these … Read more
In communication design, considering the flexibility of protocols, they are often designed to be “variable length”. An example is shown in the figure below: the communication protocol frame of the Ruimi LoRa terminal.If a system receives the above “variable length” protocol frames, there will be a challenge — how to efficiently receive and parse them.To … Read more
This is an SPI Flash chip: The pin definitions in its datasheet are as follows: The circuit schematic of this SPI Flash chip: It connects to the SPI interface on the main control chip: The SPI interface is very common, and below I will try to explain what the SPI interface is in simple terms. … Read more
Click the Blue Text Follow Us 1. What is SPI SPI stands for Serial Peripheral Interface, which is a serial interface for peripheral devices. SPI is a high-speed, full-duplex, synchronous communication bus with a master-slave structure, occupying only four lines on the chip pins, saving pin space and providing convenience for PCB layout. Due to … Read more