Worked on the apache/nuttx-apps repository, focusing on reliability improvements for MQTT client functionality in embedded systems. Addressed two critical bugs over a two-month period, first correcting the Quality of Service argument parsing by updating the type handling from char to long, which ensured accurate interpretation of MQTT QoS levels and improved protocol reliability. Subsequently, enhanced error reporting by fixing a typo in the MQTT initialization failure message, making troubleshooting more efficient for developers. All changes were implemented in C, leveraging expertise in embedded systems and the MQTT protocol, with careful attention to code maintainability and minimal impact on existing features.