Developed reverse-byte-order support for fritz_cal_extract in the immortalwrt repository, enabling accurate processing of calibration data for the AVM FritzBox 7430. The work involved implementing a reverse option and introducing an intermediate buffer to ensure compatibility with existing forward extraction workflows. By addressing the challenge of legacy hardware storing data in reverse byte order, the solution reduced data-parsing errors and improved firmware analysis capabilities. Leveraging expertise in C programming, embedded systems, and firmware analysis, the developer enhanced device compatibility and deployment reliability. The contribution focused on robust, maintainable code that supports both legacy and current hardware requirements within embedded environments.