This post guides developers on setting up Visual Studio Code for Zephyr RTOS application development, starting with installing VS Code and creating an isolated development environment using profiles to avoid conflicts with other extensions. It covers essential extensions like C/C++, CMake Tools, and Serial Monitor, and provides step-by-step instructions for project setup, including creating necessary files and configuring CMake. The author explores different configuration methods, including using `settings.json` for automating build processes and debugging, `CMakePresets.json` for managing multiple build configurations, and `.code-workspace` for a more integrated environment. The post also includes practical examples, such as blinking PWM LEDs and implementing a custom device driver, demonstrating how to leverage VS Code for Zephyr development. By the end, readers will understand how to configure VS Code for efficient Zephyr application development, including building, flashing, and debugging.