In February 2025, Yangminglong developed a Sun-Based Brightness Control Usermod for the samyk/WLED repository, enabling dynamic LED brightness adjustment based on the sun’s position to optimize plant growth and ambiance. The solution incorporated a sun-tracking algorithm and robust configuration management, allowing users to set minimum and maximum brightness, update intervals, and relaxation periods around sunrise and sunset. Working primarily in C and C++, Yangminglong demonstrated expertise in embedded systems and firmware development. The feature improved energy efficiency and user control without introducing major bugs, reflecting a focused, end-to-end engineering approach with depth in IoT and modular firmware integration.