▼ Click the card below to follow me ▲ Click the card above to follow me HTTP requests are like the circulatory system for modern software development, connecting different systems and services. Traditional HTTP libraries have served us well for many years, but as application complexity increases, we urgently need a more powerful and efficient … Read more
Using HTTP requests in Locust is very straightforward, as Locust is primarily designed for load testing and performance testing, with built-in support for HTTP requests. With Locust’s HttpUser class, you can easily send GET, POST, and other types of HTTP requests, and leverage Locust’s powerful features to simulate the behavior of a large number of … Read more
▼ Click the card below to follow me ▲ Click the card above to follow me Httpx: The Future Star of Asynchronous HTTP! In today’s ocean of web programming, asynchronous network requests are like a speedboat gliding effortlessly. Httpx is undoubtedly the coolest presence in this domain. Imagine traditional HTTP libraries as waiting in line … Read more
A practical scenario for the HTTP ETag header is for client HTTP caching of GET requests. Additionally, the caching workflow also requires handling other conditional HTTP headers, such as If-Match or If-None-Match. However, the interaction of these headers can sometimes seem a bit complex. Whenever I need to deal with this issue, I always spend … Read more
The Modicon M262 is the first PLC launched by Schneider Electric aimed at the Industrial Internet of Things (IIoT), capable of connecting directly to cloud platforms via protocols such as MQTT and HTTP, with TLS network security encryption. The left side of the image below shows the traditional method of connecting PLCs to the cloud, … Read more
Introduction A communication debugging tool developed based on WPF, featuring a user-friendly interface and easy operation. It supports both Modbus and MQTT protocols, enabling debugging of various communication methods. Whether in industrial automation, smart home, or IoT fields, this tool can meet your needs. Additionally, the code is open source and modular, making it highly … Read more
In the previous issue, we introduced the publish and subscribe framework of MQTT: MQTT Publish and Subscribe Architecture The two most important roles are MQTT clients and MQTT brokers (intermediaries). Let’s quickly review these two core components: The publish/subscribe model decouples the client responsible for sending messages (the publisher) from the client responsible for receiving … Read more
(Add a star to BoLe Online to see classic articles) Source: Ruheng Link: https://juejin.im/post/6844903490595061767 1. TCP/IP Model The TCP/IP protocol model (Transmission Control Protocol/Internet Protocol) consists of a series of network protocols that form the foundation of the Internet and is the core protocol of the Internet.The reference model based on TCP/IP divides the protocols … Read more
1. Overview of the Porting Process Hardware Platform Setup Selection of the main control chip: It is recommended to use the STM32F4 series (such as STM32F407) or Microchip SAMD5x series, which must support SPI/SQI or HBI interfaces to communicate with LAN9253. Hardware connection: LAN9253 connects to the main control via the SPI interface, requiring configuration … Read more
【Introduction】A complete video on the differences and comparisons between PROFIBUS and PROFINET. Recommended Reading (1) A Large System Failure Handling Experience (2) S7-400 DP Communication Failure Handling Example (3) S7-300 PN Communication Failure Handling Example The following video is sourced from PROFINET What Everyone is Watching 【Video】How German Engineers Create PLC Cabinets? 【Video】How are German … Read more