Advantage over the builtin web server The web server built in the device already provided a part of this function. For a developper, this library adds the possibility to make the device follow the flow of its application. The applications which use this library can make decisions according to the level of contamination of the last sample. Like this, they can optimize the standard (incremental sampling, ...), immediatly notify the end-user, etc. Moreover, the end user can easily register additional information for each sampling when it starts or when it completes (accurate geospatial information, ...).