Indoors Localization
We are all familiar with GPS. We use it almost everyday. One thing GPS is bad is indoors localization like in a mall or an underground metro station. There exist tools to provide such indoors localization, and one of my school project was to set this up. The goal was to code and flash Wismote sensors in order to localize a node in a given indoors environment. The Contiki Operating System was used for this. You can find the code source on this page, along with a report (unfortunately only in French).