Explore the intricacies of composable firmware development for deeply embedded systems in this CppNow 2023 conference talk. Dive into a live demonstration of creating a remote-controlled RGB lighting controller, covering hardware register access, interrupt handling, logging, task registration, and safe arithmetic. Follow along as the hardware is built from scratch, including microcontroller setup, logic analyzer usage, USB UART adapter integration, RGB LED implementation, and IR receiver addition. Learn about C++ design concepts such as compile-time constructs, component decoupling strategies, and hardware abstraction techniques. Gain insights into modern C++ approaches for efficient and maintainable firmware development in tiny embedded systems.