Worked on stabilizing timer-driven functionality for ESP32 S3 boards within the espressif/arduino-esp32 repository, focusing on embedded systems and IoT applications using C++. Addressed a bug in the RepeatTimer component where the timer would stop immediately after starting by modifying the BTN_STOP_ALARM pin mode from INPUT to INPUT_PULLUP. This adjustment ensured that digitalRead would not default to LOW, thereby improving the reliability of task scheduling across affected microcontroller boards. The work demonstrated a methodical approach to hardware-level debugging and contributed to more robust timer operations, reflecting a strong understanding of microcontroller behavior and low-level C++ programming practices.