Systems providing comprehensive software infrastructures and tools for acquisition, storage and visualization of data produced by distributed sensors begun to appear in the last few years. To face the issues and challenges related with the realization of such infrastructures, we started Desthino, a project that aims at providing an easy-to-use framework for collecting, storing, managing and visualizing sensor data. As a first step towards the realization of this project, we developed Minos, a Java-based tool that allows to easily collect and store data generated in wireless sensor networks. The data is parsed according to a generic schema and archived at a central repository. External users can access the collected data in real-time or at at a later stage through a standardized interface.