Uart, Can, Spi, Rtos, I2c, hal, PX4, low-level driver development, Mission Planner, ArduPilot, flight controller firmware development, STM32CubeIDE, telemetry systems, Gazebo, flight data logging, UAV systems, bootloaders, STM32 micro-controllers, real-time sensor data processing, complete firmware development life cycle, QGroundControl, LL libraries, ground control integration, board bring-up, aerospace control systems, PID-based flight dynamics