A practical handbook on reverse engineering. Covers embedded firmware (ARM Cortex-M, Xtensa/ESP32, RISC-V, 8051, MIPS), Linux userland, kernel modules and device trees, plus hardware attacks (fault injection, side-channel analysis). Uses radare2 as the primary tool example. PDF + web book.

Layered embedded firmware framework (4-Layer: APP/DCA/DDI/DRV) showcasing ISR minimization, RTOS synchronization, and vendor isolation patterns. Renesas RA + Azure RTOS ThreadX. Read-only portfolio excerpt with domain IP redacted.

A high-efficiency embedded power management platform designed for solar energy harvesting applications. The system integrates MPPT-based photovoltaic power extraction, LiFePO4 battery charging, battery protection, real-time monitoring, and a professionally engineered 4-layer PCB developed in Altium Designer with STM32-based control.

Compact ESP32-based remote controller firmware for RC projects. Reads two analog joysticks and two thin-film pressure sensors, packs the data into a small Payload and transmits it wirelessly via nRF24L01. Minimal, easy-to-adapt Arduino/PlatformIO code intended for rapid prototyping and custom receiver integration.

Minimal ESP32-C3 bootloader for the Waveshare ESP32-C3 Zero, with deterministic boot states, CRC-checked handoff, and reproducible validation evidence.

A compact BLE smart tracker that helps quickly locate misplaced vehicle keys.

GitHub profile for Luong Hai Long: computer vision, AI/ML, network communications, FPGA/SoC, embedded systems, releases and contact links.

Digitally regulated CCCV flyback power supply for 230V AC. Implements cascaded PI control, ADC-based feedback, and PWM regulation via STM32L011 MCU. Features UART communication, galvanic isolation, and production-grade PCB design with full EMC compliance.

🛠️ Streamline your CAN bus network setup with this reference guide, offering practical notes on configuration, debugging, and validated operating behavior.

ESP32-based flight controller for hexacopter/quadcopter drones with cascading PID control, IMU sensor fusion, and comprehensive safety features. Successfully flight-tested disaster response drone platform.

ESP32-based flame detection and alarm system using a flame sensor, SSD1306 OLED display, LEDs, and buzzer with real-time fire alert monitoring.

ESP32-based weather station using a BMP280 sensor and SSD1306 OLED display for real-time temperature, pressure, altitude, and weather trend monitoring with visual and audible status indicators.

ESP32-based magnetic security monitoring system using an A3144 Hall Effect sensor, OLED display, LEDs, and buzzer for real-time door status monitoring and intrusion alert indication.

ESP32-based gas and smoke monitoring system using an MQ-2 sensor, SSD1306 OLED display, LEDs, and buzzer with multi-state alert logic.

Selected CAN bus reference notes covering bring-up, configuration, timing, debugging, and validated operating behavior for embedded systems (STM32).