Functional reactive programming (FRP) is a programming paradigm for reactive systems based on functional abstractions expressing time-varying values and events. In this paper, we present a strongly-typed pure FRP language named CFRP to show that FRP is beneficial for developing software for smallscale embedded systems. Although its design follows the tradition of signalbased FRP languages, our compiler can generate stand-alone C++ code that can be deployed effectively on resource-constrained microcontrollers. Through an example, we show that CFRP supports a declarative, modular and clean manner of developing small-scale embedded systems.