Worked on the Fmstrat/esphome repository to enhance hardware compatibility for ESP32H2 devices by addressing a critical bug in CAN bus support. Using C++ and embedded systems expertise, corrected the ESP32 variant macro logic in the codebase, ensuring accurate identification of the ESP32H2 variant and enabling proper CAN bus functionality. The solution involved an isolated, targeted patch that minimized risk and maintained overall system stability across ESP32 variants. This work focused on feature stability rather than new feature development, with thorough validation and testing to preserve code quality and reduce the risk of hardware misidentification in embedded environments.