ESP32 Smart-Pen Firmware & CAD

I’m advancing a connected-pen prototype built around an ESP32, a compact LCD, and a 9-axis IMU. My rough Arduino-IDE sketch runs, but it needs clean, documented code and solid debugging so the three boards talk flawlessly... (Budget: $15 - $25 USD, Jobs: Arduino, Debugging, Electrical Engineering, Electronics, Embedded Systems, Fusion 360, G-code, Microcontroller)