Gu S.

Embedded Systems & IoT Product Development Engineer | STM32 • ESP32 • Nordic • Silicon Labs • PCB Design I help startups and companies transform ideas into production-ready embedded products. With 8+ years of experience in embedded systems, firmware development, PCB design, wireless connectivity, and product commercialization, I provide complete end-to-end engineering support—from concept and architecture to prototypes, testing, and manufacturing. My expertise spans industrial automation, IoT devices, wireless sensor networks, battery-powered systems, smart metering, wearable electronics, RF products, and custom embedded hardware. What I Deliver: • Embedded firmware development (Bare Metal, FreeRTOS, Zephyr) • Custom PCB design (Altium Designer, KiCad) • Hardware architecture and schematic design • Prototype bring-up, debugging, and validation • Low-power and battery-operated device optimization • Manufacturing-ready design packages (Gerbers, BOM, Assembly Files) • Design for Manufacturing (DFM) and Design for Test (DFT) • Technical documentation and production support Core Technologies: • STM32 (F0/F1/F4/F7/H7/U5/L0/L4/L5) • ESP32 (ESP-IDF, Arduino) • Nordic nRF52 Series • Silicon Labs EFR32 Series • RP2040 / Raspberry Pi • NXP and Microchip MCUs Wireless & Connectivity: • BLE / Bluetooth Low Energy • Wi-Fi • LoRa / LoRaWAN • Wi-SUN FAN • Zigbee • Thread / Matter • Cellular (LTE-M, NB-IoT, GSM) • RS-485 / Modbus • CAN / CAN-FD • Ethernet / TCP-IP • USB Applications & Sensors: • Environmental Monitoring • Industrial Automation • Smart Metering • Wearable Electronics • GPS Tracking • Energy Monitoring • Medical & Bio-Sensing Devices • Motor Control • Data Acquisition Systems Development Tools: • STM32CubeIDE • VS Code • Keil MDK • IAR Embedded Workbench • MPLAB X • Altium Designer • KiCad • LTspice • Git Whether you need a new product designed from scratch, firmware development for existing hardware, PCB design, debugging, or manufacturing support, I can help bring your project from concept to a reliable, market-ready product. Let's discuss your project and turn your idea into a working product.