Worked on the esphome/esphome repository to enhance core stability and reliability for embedded systems using C++. Focused on improving OneWire sensor integration by addressing communication issues that caused unreliable device detection. Implemented a fix that resets the OneWire bus before issuing the SKIP ROM command, ensuring accurate presence detection and reducing false negatives during hardware communication. This targeted bug fix improved compatibility with a range of OneWire sensors and contributed to more robust system performance. The work demonstrated a methodical approach to debugging and upstream alignment, leveraging C++ programming skills and a strong understanding of embedded hardware protocols to resolve persistent issues.