During December 2024, Holymog developed a Luxembourg-specific SlimmeLezer integration for the evcc-io/evcc repository, focusing on regional expansion and precise sensor data collection. They designed and implemented a dedicated device template and configuration using YAML, enabling the system to fetch power, energy, and current data from Luxembourg sensor endpoints. Their approach incorporated phase-based calculations to deliver accurate power metrics and production estimates, addressing locale-specific requirements for embedded systems and IoT deployments. By creating a reusable, template-driven integration method, Holymog streamlined future regional onboarding, demonstrating depth in configuration management and embedded systems within a focused, production-ready engineering effort.