I am an IoT & Hardware Engineer experienced in firmware and hardware interaction, and real-time embedded systems, with a strong focus on reliability and practical deployment.
Experience
RF hardware design, PCB development, and system validation for the Aura Smart Farm IoT ecosystem, including production support and RF performance verification.
- Supported the transition of IoT devices from prototype to mass production by validating hardware designs and optimizing firmware for stability.
- Coordinated with PCB/SMT factories to troubleshoot assembly issues, verify component quality, and ensure production standards.
- Assisted sales teams by defining technical specifications for contracts and provided on-site debugging/maintenance for key client deployments.
- Deployed and maintained LoRaWAN sensor nodes across multiple farm sites, ensuring 24/7 connectivity and reliable data transmission.
Performed functional testing and debugging of embedded devices using lab equipment (multimeter, oscilloscope, spectrum analyzer).
Projects
RF design and validation for a mass-production LoRa sensor device.
- Designed Sub-GHz RF front-end (high-power and low-power variants) based on STM32WL55 reference designs.
- Implemented PA/LNA circuits and calculated impedance matching networks following ST documentation
- Designed 4-layer PCB with controlled impedance and RF layout considerations for Sub-GHz operation.
- Verified transmit power, frequency band compliance, and spectral characteristics to meet regulatory requirements.
Integrated real-time sound monitoring and environmental control system for high-efficiency bird nest farming.
- Designed a control PCB integrating ESP32 with analog audio front-end and relay switching for AC loads.
- Designed RF impedance matching network between ESP32 RF port and antenna for 2.4 GHz operation.
- Implemented relay driver circuits and considered switching noise and isolation for mixed-signal operation.
- Designed PCB layout with basic separation between analog sensing paths and high-current relay switching.
- Coordinated with Dien Quang manufacturing engineers on BOM management and SMT assembly flow for production.
End-to-end embedded project building a complete quadcopter drone based on Espressif open-source ESP32 drone platform.
- Built a complete drone system using ESP32 including flight control and communication.
- Designed schematic and PCB layout for drone electronics and performed hardware bring-up.
- Developed and modified embedded firmware in C based on Espressif open-source projects.
- Integrated IMU sensors, ESC motor drivers, and control logic.
- Tuned control parameters and performed testing on real hardware.