Andy Hsu worked on the Wiwynn/OpenBIC repository, focusing on enhancing current measurement accuracy by tuning the ADM1281 current sensor correction factor from 0.4 to 0.8. He implemented this adjustment in embedded C, collaborating closely with the electrical engineering team to align calibration with hardware requirements. His work involved embedded systems development, sensor calibration, and hardware integration, ensuring the firmware changes improved power management reliability without introducing regressions. Andy validated the updated sensor readings against expected outcomes, demonstrating careful code review and version control practices. This targeted feature addressed instrumentation confidence and supported cross-team engineering objectives within the project.