Marc Siekmann modernized the SenseMatePCB hardware project within the smartuni/riot-po-2025 repository by reorganizing the folder structure to improve modularity across RIOT, BLE, hardware, and server-side components. He established a scalable foundation for future development by implementing comprehensive README scaffolding, supporting both documentation and onboarding. His work focused on file system operations and project management, ensuring that architectural changes were transparent and traceable through detailed commits. Although the scope was limited to foundational restructuring and documentation, Marc’s contributions addressed maintainability and cross-team collaboration, setting the stage for efficient hardware, firmware, and server-side feature development in subsequent project phases.