Fengjian (feng_keji) Original Editor | Bai Zhengming Over 20 years ago, when the concept of smart homes was first proposed, the evolution of home appliances and devices was inseparable from the whole-house smart experience. From the active interaction between people and content devices like TVs and controllers, to the passive adjustment of environmental devices like … Read more
In the previous article, we discussed the differences between Modbus and RS-485, which belong to different layers. If we use a language analogy, then Modbus determines which “language” to use, while RS-485 and RS-232 determine the method of communication, such as face-to-face or telephone communication. In this article, we will discuss the differences between RS-485 … Read more
Introduction The previous article introduced how to deploy an openEuler learning environment on the Hi168 cloud platform. Since we can deploy openEuler, various other learning environments can naturally be deployed as well. Introduction to Ansible Ansible is an automation tool for IT operations that can manage remote hosts via SSH protocol, performing batch operations on … Read more
The following is a detailed design and implementation plan for smart locks and APP communication via Bluetooth BLE, covering protocol design, security mechanisms, development processes, and typical scenarios, helping developers quickly implement remote control and status management of smart locks: 1. Smart Lock and APP Communication Protocol Design (1) Service and Characteristic Definitions Smart locks … Read more
Free for commercial use! An industrial Internet of Things platform with over 1500 components. IoT MQTT and CoAP, which one is your favorite? The lightweight IoT protocol CoAP. In the Industrial Internet of Things (IIoT), industrial devices often require frequent data collection and communication. Here, we must mention a lightweight protocol: CoAP (Constrained Application Protocol). … Read more
Contact the author via WeChat: xiaoda0423 Repository address: https://webvueblog.github.io/JavaPlusDoc/ https://1024bat.cn/ 🚀 1. Frontend and Backend Cache Strategy Coordination 🔧 1. Frontend: Effectively Utilize Browser Cache Strong Cache (from disk cache / memory cache) The browser hits the strong cache, does not send a request, and directly uses the local cache Suitable for static resources that … Read more
Introduction and Background In the previous section, we implemented an HTTPS server that supports public network access, HTTP/3, HTTP/2, and multiple domains, initially integrating high-performance features. This article will focus on further enhancing the high-performance optimization aspects, covering TLS optimization, QUIC optimization, concurrency optimization, network optimization, certificate management, monitoring and tuning, and load balancing, to … Read more
Click the blue text to follow us Recently, I encountered a requirement to implement HTTP logging myself. Adhering to the principle of not reinventing the wheel, I first consulted AI and found a framework called logbook. As an HTTP logging framework, logbook can fully capture the headers, parameters, and body of requests and responses. This … Read more
The current stable HTTP API of Prometheus can be accessed via /api/v1. API Response Format The Prometheus API uses JSON format for response content. When the API call is successful, it will return a 2xx HTTP status code. Conversely, when the API call fails, it may return the following different HTTP status codes: 404 Bad … Read more
Click the above“blue text” to follow us “Encountering this problem again?” When images on the website load slowly, users start complaining, and the operations team looks confused at the server monitoring. This scene is too familiar, right? In fact, this may be due to improper caching of static resources. In Go language development, correctly implementing … Read more