It has earlier been possible to see graphs in NetHomeServer via the separate Thermometer-GUI.
Now I have added the graphing feature to the main NetHomeServer GUI. Any HomeItem with a LogFile-attribute will automatically get a graph-link in the Room-page and in the Plan-page. When you press that link you will get to the graph page of that Item which will display a graph of the values in the log file. This feature is currently built in to all thermometer and humidity Items. On the Graph page you can view the data over a day, over a week and over a month and you can also move back and forth in the data. The graph is also interactive so you can zoom into the displayed graph by selecting an area with the mouse. This feature is currently available in the nightly build.