離婁之明、公輸子之巧、不以規矩、不能成方圓。《孟子》
不聞不若聞之，聞之不若見之，見之不若知之，知之不若行之，學至於行之而止矣。《荀子·儒效》
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Posts Listing
Reinstall OpenVPN on MJ1900 (Debian 12)
Introduction The first attemp to install openvpn on MJ1900 was based on the installation script…
Manage OpenVPN Clients by scripts for VM-Debian 12
Introduction The OpenVpn server has been successfully implemented on the virtual box vm-debian 12 guest…
Install OpenVPN on a Debian 12 Virtual Machine
Introduction This article covers the installation of OpenVPN on a virtual box machine with the…
Apeche Server – Mod_Rewrite
Introduction This article is an extract from the 2 hours long video in here. To…
Systemd (linux command)
Introduction This article is an extract and simplified version of the Source: Systemd is a…
Common Linux Commands
Smart Bin Project (based on ESP32C3)
Background Due to the unreliable mounting of the servo motor, the smart bin was decommissioned…
Ivr-YouTube Embed for WordPress
About This plugin is developed for TheDesignOrder website in the 2023 revamp project. it provides…
Cmake in ESP-IDF
ESP32 Series – Proj 02-FRTOS-Tasks
Project-02 Objectives Explore the use of Free Real Time Operating System (FreeRTOS). Create Task 1…
ESP32 Series – Project 01-gpio-button
Purpose This project series is to study the capablilities of the ESP32 MCU family, with…
Learn C++ (7) – OOP
Reference W3School – C++ Tutorial Create a Class To create a class, use the class keyword and…
Learn C++ (6) – References
Reference W3School – C++ Tutorial Creating References A reference variable is a “reference” to an…
Learn C++ (5) – Program Control
Reference W3School – C++ Tutorial Conditions check Support these conditional check: if elseelse if(condition) ?…
Learn C++ (4) – Data Types
Reference W3School – C++ Tutorial Data Types Data TypeSizeDescriptionbool1 byteStores true or false valueschar1 byteStores…
Learn C++ (3) – User Input and Output
Reference W3School – C++ Tutorial cout and cin cout is used to output (print) values. cin is…
Learn C++ (2) – Constants
Reference W3School – C++ Tutorial Constants When you do not want others (or yourself) to…
Learn C++ (1) – Variables
Reference W3School – C++ Tutorial C++ Variables In C++, there are different types of variables (defined with…