Introduction in one sentence: Playbooks are the core of Ansible, describing tasks using YAML, making automation repeatable and maintainable. 1. What is a Playbook? A Playbook is like a “script” for Ansible, defining a series of tasks to be executed in a YAML file and specifying on which hosts to execute them. Its characteristics are: … Read more
Introduction When using<span><span>HttpWebRequest</span></span> to initiate HTTP requests in C#, you can improve concurrency and performance in the following ways: 1. ServicePointManager Settings <span><span>ServicePointManager</span></span> is a static class that provides properties and methods for managing HTTP connections. To enhance concurrent performance, you need to adjust the following key properties: DefaultConnectionLimit: By default, the .NET Framework’s<span><span>ServicePointManager</span></span> limits … Read more
HTTP, or HyperText Transport Protocol, is a network technology that defines the communication between browsers and servers. It operates at the application layer and uses TCP port 80 to provide services. Hypertext is a type of text that links text, images, videos, and other multimedia content together. It not only includes textual content but also … Read more
In today’s Internet of Things (IoT) era, the MQTT (Message Queuing Telemetry Transport) protocol has become one of the mainstream protocols for connecting various devices and systems. For .NET developers, choosing a high-performance, stable, and easy-to-use MQTT library is crucial. Today, we will recommend a high-performance .NET library—MQTTnet. Introduction to MQTTnet MQTTnet is an open-source … Read more
Do you understand the TCP/IP protocol? A set of communication protocols used to implement network interconnection, containing complete rules from data transmission to application services. Core Protocols: TCP: Transport layer protocol that provides reliable, connection-oriented byte stream services (such as file transfer, web browsing). IP: Network layer protocol responsible for addressing and routing data packets … Read more
What is Modbus? Understanding It Clearly to Avoid Pitfalls Next Time Last night, a junior was debugging the RS-485 bus, and the slave device just wouldn’t respond. After capturing the data, I found: the CRC low byte was reversed! Not fully grasping the Modbus frame format meant that 1 byte error = total failure. Today, … Read more
The Modbus protocol specifies the use of big-endian byte order at the byte level. However, for data types larger than 16 bits (i.e., 2 bytes) such as 32-bit floating-point numbers and 32-bit integers, the protocol does not define the order of words, leading to different implementations by various device manufacturers. Here is a detailed explanation: … Read more
Hello everyone, this is IoT Heart. GDB is a debugging tool frequently used by Linux developers, and I believe most readers are familiar with using the gdb command to debug programs. So, are you curious:Why can gdb debug our programs? In this article, we will explore this.1. What is GDB? GDB is a debugger for … Read more
Recently, Professor Thomas Kodadek’s team at the University of Florida published a research paper titled “Exploiting Avidity Effects for the Discovery of Low-Affinity Protein-Binding Fragments” in the Journal of Medicinal Chemistry. This groundbreaking fragment drug screening technology innovatively utilizes avidity effects, successfully developing a new platform for efficient and low-cost fragment screening. Research Background Fragment-based … Read more
With the intensification of population aging, the prevalence of neurological disorders such as stroke, dementia, Parkinson’s disease, and epilepsy continues to rise, posing a significant challenge to public health in our country. Neurological disorders are characterized by chronic progression and symptom fluctuations, and their effective management relies on long-term, dynamic, and precise monitoring and individualized … Read more