TeHyBug the ultimate temperature and humidity spy-bug for your home, it tracks the temperature and humidity periodically and send it to the TeHyBug-Server where your can view the data in a nice daily/hourly graph. Track the temperature and humidity in your private server room, basement, storeroom, library etc.. Put it at any place where your wifi network is available, the battery lasts for many month (depends on configured data frequency). Set notifications on the TeHyBug website to receive email messages when temperature or humidity reaches some level which you can set.
Order your TeHyBug in this store: https://www.tindie.com/stores/gumslone/