During January 2025, Jan Pisa focused on improving the CTU CAN FD driver in character device mode within the apache/nuttx repository. He addressed a critical bug affecting CAN FD message handling by refining the assignment of the CAN FD format flag during message reception and resolving mismatches in driver constant definitions. Working primarily in C and leveraging his expertise in CAN Bus protocols and embedded systems, Jan delivered a targeted code patch that stabilized message transmission and reception for the driver. His work demonstrated a deep understanding of device driver internals and contributed to more reliable operation of /dev/ctucanfd in embedded environments.