Zehao W.

I help makers, students, and small teams build embedded electronics prototypes, from firmware development to simple PCB design. My experience includes embedded C/C++ development, microcontroller-based projects, LoRa/GNSS module integration, schematic design, 2-layer PCB layout, power supply sections, and prototype testing. I have worked on projects including a smart car, a LoRa/GNSS handheld positioning receiver, and a 2-layer Renesas MCU expansion board integrating 4 LoRa modules, a GNSS module, a BeiDou module, and onboard power circuitry. I can help with: • Embedded firmware for Arduino, ESP32, STM32, and microcontroller projects • Sensor/module integration using UART, I2C, and SPI • Schematic design and 2-layer PCB layout • BOM, Gerber, and prototype documentation • Basic enclosure adjustments with SolidWorks I focus on clear communication, practical solutions, and prototype-ready deliverables.