RS232 and RS485 are common interfaces in low voltage applications. Many friends have mentioned the differences between them, so today let’s learn about them together. 1. Physical Structure of the Interfaces 1. RS232 Interface: One of the computer communication interfaces, RS-232 interfaces typically appear in the form of 9 pins (DB-9) or 25 pins (DB-25). … Read more
Introduction to RS-232 Serial Port Data transmission between computers or between a computer and a terminal typically employs two methods: serial communication and parallel communication. Serial communication is widely adopted due to its lower cost and fewer lines used, especially in remote transmission, which avoids inconsistencies caused by multiple lines. In serial communication, both parties … Read more
What Is USB? USB is a universal serial bus interface standard used to connect computer systems and external devices for data transmission and power supply. Advantages: High-Speed Transmission: The USB interface provides high-speed data transfer rates, suitable for quickly transferring large volumes of data. Hot Swappable: USB devices can be plugged and unplugged while the … Read more
Using LoRaWAN for firmware over-the-air upgrades (FOTA) is quite challenging. Currently, the LoRa Alliance has not mentioned much on this topic, although it can be implemented in Class B and Class C devices. The reasons why firmware over-the-air upgrades using LoRaWAN are difficult include: 1. The communication of the base station cannot occur simultaneously. This … Read more
Background Having been in a long-distance relationship with my girlfriend for over a year, I suggested that we video chat every night to maintain our feelings. Since we started dating, we have managed to keep this up for over a year. Problem Sometimes during our chats, either my network or hers might be unstable, causing … Read more
Click the “Learn Algorithms in Five Minutes” above and choose the “Star” public account Heavy content delivered first Source: Juejin, Author: Ruheng Link: https://juejin.im/post/6844903490595061767 1. TCP/IP Model The TCP/IP protocol model (Transmission Control Protocol/Internet Protocol) includes a series of network protocols that form the foundation of the Internet and is the core protocol of the … Read more
Currently, there are many network protocols built on the TCP protocol, such as telnet, ssh, ftp, http, etc. These protocols can be roughly divided into two categories based on data throughput: (1) Interactive data types, such as telnet and ssh. These types of protocols usually only do small-scale data exchanges, such as pressing a key … Read more
Follow our official account to never miss any updates! This tutorial was originally published by the author strongerHuang in October 2018. Tags: CAN, CANOpen, CanFestival Copyright: Commercial use is prohibited Disclaimer:This document is for personal learning use only. Please contact the author via the official account for authorization if you wish to reprint. 1Introduction This … Read more
We often use Bluetooth in our phones, right? For example, connecting to Bluetooth headphones to listen to music or transferring files between different devices, Bluetooth is a very convenient data transmission method. But have you ever wondered, since it is a transmission technology, why is the “Bluetooth” used in phones given such a strange name? … Read more
On July 12, 2018, this public account discussed LoRa technology and mentioned that in today’s internet era, new technologies are emerging one after another!Zigbee is also a product of the network era, representing a new wireless communication technology, whose technical characteristics can be summarized as “one close and four lows”—a bidirectional wireless communication technology, specifically … Read more