Worked on hardware pin configuration for the zephyrproject-rtos/hal_rpi_pico repository, focusing on aligning board pin definitions with the release version to support consistent hardware-software integration. Updated mappings for RTC, LoRa, and FUSB307 components, defined the default LED pin, and removed the PICO_DEFAULT_SPI_CSN_PIN to enable compatibility with multiple SPI devices. All changes were linked to the release header to ensure build consistency and reduce integration risk for downstream users. The work was completed using C and embedded systems skills, emphasizing hardware configuration and careful coordination with release requirements to prepare the repository for broader usage and maintainability.