Worked on the espressif/esp-nimble repository, focusing on improving the Nimble Bluetooth stack by addressing a critical compile error related to Constant Tone Extension (CTE) variable type conversions. Applied expertise in C and embedded systems to enhance data type handling, which reduced build failures and streamlined downstream integration for Bluetooth Low Energy applications. Added comprehensive function declaration comments throughout the codebase, supporting maintainability and easing onboarding for future contributors. The work strengthened the stability of the firmware and established a more robust foundation for ongoing development, ensuring that future features and bug fixes can be delivered with reduced integration risk.