Worked on the apache/nuttx repository to improve Bluetooth HCI device lookup reliability in embedded systems. Addressed a bug where Bluetooth devices could be misidentified if non-Bluetooth interfaces, such as loopback or Ethernet, appeared before them in the global interface list. Replaced the previous netdev_findbyindex approach with a netdev_foreach-based lookup, ensuring only Bluetooth devices were counted when mapping HCI sockets. This change, implemented in C and leveraging skills in Bluetooth development and network programming, increased the reliability of Bluetooth HCI connections across deployments and reduced troubleshooting time related to device mapping in embedded environments. No new features were added.