This project aims to port the Contiki OS to MSP-EXP430F5438 experimenter board. The experiment board is built around the MSP430F5438 micro-controller and has several peripherals including an audio input, a serial port, and a LCD. During port operations MSPGCC compiler is used. Although MSPGCC compiler has support for the MSP430 architecture, its support for the MSP430X architecture is buggy, therefore several patches were applied to the compiler. Also several device drivers are implemented to use all features of the experimenter board. Combining the advanced features of the MSP430F5438 micro-controller and the Contiki OS, we provide a powerful rapid development environment for sensor networks researchers.