About Yibin
I help companies debug, stabilize, and ship embedded products on STM32, ESP32, nRF52, EFR32, NXP KL17, JieLi, HDSC, and other ARM / RISC-V platforms.
Typical problems I solve:
• STM32 hard faults, crashes, boot issues
• Custom board bring-up and peripheral integration
• BLE / LoRa / MQTT connectivity issues
• RS485 / Modbus communication instability
• Low-power optimization for battery-operated devices
• OTA reliability issues
• Porting firmware to new boards, MCUs, or RTOS platforms
• Turning prototypes into production-ready firmware
I have 15+ years of embedded development experience across industrial communication systems, low-power IoT devices, wireless products, and mass-production consumer electronics. My background includes product lines with more than 10M devices shipped.
Core platforms and technologies:
• STM32 / ESP32 / nRF52 / EFR32/ NXP KL17 / JieLi
• FreeRTOS / Zephyr / Arduino / PlatformIO
• BLE / LoRa / NB-IoT / 4G / Cat.1
• RS485 / Modbus / UART / SPI / I2C
• AWS IoT / MQTT / OTA
• Battery-powered and ultra-low-power systems
Selected experience:
• STM32H7 controller platform with dual-core architecture, LVGL UI, RS485 communication, and ESP32-S3 connectivity co-processor
• Ultra-low-power fault indicator for utility networks with multi-year battery life and LoRa communication
• BLE thermal printer platform focused on wireless stability, motor control, print control, and production reliability
Why clients work with me:
• Strong debugging and root-cause analysis
• Real production and manufacturing support experience
• System-level architecture thinking
• Clear communication and practical decisions
• Reliable long-term collaboration
Available for:
• Firmware debugging and stabilization
• Custom board bring-up
• New feature development
• RTOS-based firmware architecture
• Wireless and industrial communication projects
• Long-term embedded support
Based in China (UTC+8), with flexible overlap for US / EU / AU teams.
English
Fluent
Chinese
Native or bilingual
Remote only
Primarily works remotely
Experience
- Freelance / Independent (Upwork Top Rated Plus)Senior Embedded Systems EngineerINTERNET OF THINGS (IOT)January 2019 - Today (7 years and 5 months)Fuzhou, ChinaI provide embedded firmware consulting and development support for IoT, industrial, and wireless products.Typical work includes:• Debugging and stabilizing embedded systems in development or production• Custom board bring-up and peripheral integration• Low-power optimization for battery-operated devices• BLE / LoRa / RS485 / Modbus communication troubleshooting• RTOS-based firmware architecture and implementation• Firmware migration across MCU platformsPlatforms and technologies:• STM32 / ESP32 / nRF52 / NXP KL / EFR32 / other ARM and RISC-V MCUs• FreeRTOS / Zephyr• UART / SPI / I2C / ADC / Timer / USB• BLE / LoRa / NB-IoT / 4G / MQTT / OTAI have worked on products across industrial control, wireless sensing, consumer electronics, and utility/power systems, including production-scale deployments and long-life battery-powered devices.
- Fuzhou (Industrial / Automotive / Consumer Electronics)Firmware EngineerINTERNET OF THINGS (IOT)January 2009 - January 2025 (16 years)Fuzhou, ChinaEmbedded firmware engineer with experience across industrial control, wireless communication, low-power sensing, and consumer electronics products.Worked on a range of embedded systems including RTUs, wireless sensors, BLE products, communication modules, and battery-powered devices. Responsibilities covered firmware development, wireless protocol integration, peripheral driver development, low-power optimization, debugging, production test support, and product reliability improvement.Core areas included:• LoRa / FSK / BLE wireless communication• STM32 / ESP32 / nRF52 / other Cortex-M MCUs• Sensor applications and battery-powered systems• Production firmware and validation support• End-to-end product development from prototyping to mass production
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Education
- Bachelor's Degree in Electrical EngineeringFuzhou UniversityBachelor's Degree in Electrical Engineering