Add to ORKGEmbedded systems are often operating under hard real-time constraints, while at the same time being constrained by severe restrictions on power consumption. For such systems, robustness and reliability can be a question of life and death, which calls for rigorous system design and methodologies for validation. In this paper we advocate a design methodology for low-power, real-time systems, based on Timber; a pure reactive system model that allows for formal reasoning about various system properties. We outline how system specifications in Timber can be "compiled" into efficient standalone executables for general light- weight microcontroller based target platforms. Methods for resource analysis and implications to system dimensioning and va...