Issue 1: The driver cannot load or reports an error after loading. Possible reasons: Incorrect compilation options, module information, dependencies, symbol exports, etc.; the driver is incompatible with the kernel version; the driver is incompatible with the hardware device; errors in the driver’s initialization or exit functions; issues with the driver’s permissions or path settings, … Read more
Recently, iFLYIoT, an IoT platform developed by iFLYTEK, has been launched, bringing the total number of IoT platforms worldwide to over 450. Whether you are a developer or a professional in the field, the overwhelming variety of platforms can lead to “choice paralysis.” Let’s discuss how to quickly select the most suitable IoT platform based … Read more
Background In the wave of restructuring and accelerated adjustment of the global electronic manufacturing supply chain, more and more leading PCB companies are turning their attention to overseas markets to enhance supply chain resilience and meet global customer demands. Southeast Asia, with its complete manufacturing ecosystem, superior geographical advantages, and strong policy support, is rapidly … Read more
In simple terms, OpenWrt is a soft router. Strictly speaking, OpenWrt (full name Open Wireless Router) is a Linux distribution developed for embedded devices, especially routers, characterized by its openness and customizability. It provides a complete software development environment, allowing users to freely customize, install, and uninstall software packages to meet various network needs. Due … Read more
A piece of information regarding the dangers of WiFi About WiFi radiation WiFi has now become an integral part of our lives, and its radiation issues have been frequently questioned. There was once a news report about a pregnant woman’s family going door-to-door asking neighbors to turn off their WiFi to avoid affecting the fetus, … Read more
Practical Java Security Encryption: A Guide to HTTPS Configuration and Certificate Management Based on National Secret Algorithms Last year, when I took over a government cloud project, the client suddenly stated, “Must support national secret algorithms.” My team and I stared blankly at the native SSLContext in JDK for half an hour—this thing doesn’t recognize … Read more
Click the blue text “ShunYun Multi-Physical Field Simulation” Explore advanced algorithm engines Elliptic Curve Cryptography (ECC) is a highly regarded topic. ECC is a public key encryption algorithm that utilizes points on an elliptic curve for encryption and decryption operations. Compared to traditional RSA algorithms, ECC offers greater efficiency and security by using shorter key … Read more
ref: RFC3961 An encryption mechanism must define the following properties and operations: 1. Protocol Key Format Specifies which characters (octet string) can appear in a valid key. For keys that require special encoding, it must specify how to encode them. For encryption mechanisms that don’t have <span>perfectly dense key spaces</span>, this will describe the representation … Read more
BMW F48 (Image source: BMW Group website) Electronic Control Unit (ECU) certification is the future of connected vehicles—Flex and the BMW Group overcome this challenge based on Catena-X data exchange. The Engine Control Unit (ECU), also known as DME (Digital Motor Electronics) or DDE (Digital Diesel Electronics), is a critical component in automotive manufacturing. From … Read more
MQTT Protocol 1.1 Introduction MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol designed for low-bandwidth, high-latency networks. It provides real-time, reliable messaging services for remote devices with minimal code and bandwidth usage. MQTT operates over TCP and is classified as an application layer protocol. 1.2 Message Format A fixed header, a variable header, … Read more