Martin Ecker developed enhanced Z-Wave fan control support for the GE/Jasco Enbrighten ZWA4013 device in the home-assistant/core repository. He implemented a correct four-speed mapping, ensuring accurate device compatibility and smoother user experience within Home Assistant. Using Python and leveraging his expertise in Z-Wave integration and testing, Martin expanded the test suite to cover the new mapping and updated the discovery schema to expose the improved fan control capabilities. His work focused on robust feature delivery and code quality, laying a stronger foundation for future Z-Wave device support and reducing user friction with more precise and reliable fan control functionality.