Cici Liu

🥇 1st Place. Built a real-time autonomous vehicle control system in 36 hours for the John Deere Hackathon. Streamed live MJPEG video from an ESP32-CAM through a FastAPI backend and displayed it in a React dashboard. Integrated YOLOv8n person detection to automatically trigger a safety stop when a person entered the vehicle's path. Controlled motor speed (PWM), servo camera angle, dual lift mechanisms, and auxiliary motors over a rate-limited WebSocket proxy — all from a single browser interface.

An embedded hardware system for improving sitting posture and comfort. Designed the logic as a finite state machine, created KiCad schematics and PCB layouts, and built a pressure-sensor-based posture monitor with heating, buzzer alerts, and a sitting-duration timer.

Wrote embedded C on STM32 to decode real-time CAN bus messages and drive motor control via PWM duty cycles. Also developed accelerometer interfacing code and designed a custom KiCad PCB with hand-soldered SMD components.