Chengkai contributed to Bluetooth protocol enhancements and power management features across the AmbiqMicro/ambiqzephyr and zephyrproject-rtos/zephyr repositories. He implemented robust validation for Bluetooth SDP attribute parsing in C, preventing buffer overflows and improving device driver reliability. In zephyrproject-rtos/zephyr, he developed APIs and shell tooling for Bluetooth Classic Sniff mode, enabling dynamic power management and streamlined testing. His work included refactoring connection type checks for maintainability and adding interfaces for PNP Product ID retrieval, enhancing device identification workflows. Chengkai’s engineering demonstrated depth in embedded systems, protocol implementation, and code refactoring, addressing both reliability and developer usability in Bluetooth-enabled platforms.