This article mainly discusses how to construct a POST request when uploading files using WebKitFormBoundary in VBA, as processing PDF document conversion on the web is quite convenient. The interfaces for document conversion and status checking (it is uncertain whether the status checking code is correct) need to be examined in the browser’s developer tools … Read more
▼ Click the card below to follow me ▲ Click the card above to follow me Httpx: Making Asynchronous HTTP Requests Smooth as Silk! In the realm of network programming, HTTP requests are like messengers, responsible for transmitting messages between applications and the network world. However, traditional synchronous requests often feel like waiting in line … Read more
Hello everyone, today I want to share a particularly useful Python library – httpx. Are you still using requests to send HTTP requests? Let me introduce this more modern and powerful new option! httpx not only supports the latest HTTP/2 protocol but also handles asynchronous requests, making it a great tool for web scraping and … Read more
Advanced Java Network Programming: Basics of HTTP Protocol and Web Development In this article, we will delve into the HTTP protocol and learn how to perform simple web development using Java. As a basic user, you will understand the fundamental concepts of HTTP and how to create a simple HTTP server using Java. What is … Read more
Hello everyone! Today, let’s talk about how to connect Siemens PLCs in the workshop to the Internet of Things (IoT). The MQTT protocol (think of it as a “WeChat group” in the IoT world) is being used more and more in factories, and it’s essential to know how to work with it! After over a … Read more
1. Configuration in TIA Portal In TIA Portal, create a new project. This case selects the Siemens S7-300 PLC, model CPU 313C-2DP. This PLC is an integrated PLC with a built-in PROFIBUS-DP port, which can act as a master or a slave. In this case, the PLC acts as the master. Step 1: Add the … Read more
In SIEMENS industrial communication, the most commonly used methods are Serial; Profibus; MPI; and Ethernet communication. The maximum communication distances for each are described in the table below. Serial Communication Type Rate Maximum Distance RS 232C 300~115200bps 15 m 20 mA TTY 9600 bps 1000 m 19,200 bps 500 m 422/485 115.2 kbps 250 m … Read more
Setting Up a Modbus Simulation Testing Environment If you like this, please click the little red heart, share it, and if you want to reward me, I will continue to work hard. 1.Simulating Modbus Communication in Modbus_TCP Mode: 1.Set up a Modbus virtual master station. Use the modsim32 program to set up the Modbus_TCP virtual … Read more
JTAG interfaces come in 10-pin, 14-pin, and 20-pin configurations. Although the number of pins and their arrangement differ, some pins are common across these configurations. The definitions of each pin are as follows: 1. Pin Definitions Test Clock Input (TCK) —– Required 1 TCK is mandated by the IEEE 1149.1 standard. TCK provides an independent, … Read more
Installing CMake Tool yum install cmake Installing yaml-cpp Unzipping yaml-cpp [root@vbox ~]# unzip yaml-cpp-master.zip Entering the Source Directory [root@vbox ~]# cd yaml-cpp-master/ Creating Build Directory [root@vbox yaml-cpp-master]# mkdir build && cd build Generating Build Files [root@vbox build]# ls CMakeCache.txt cmake_install.cmake CTestTestfile.cmake Makefile util yaml-cpp-config-version.cmake CMakeFiles cmake_uninstall.cmake DartConfiguration.tcl Testing yaml-cpp-config.cmake yaml-cpp.pc CMake Installation (Generating Shared Library) … Read more