| http://www.w3.org/ns/prov#value | - Myself and another forum user have built a temperature loggin system using an Arduino, Ethernet Shield (or Arduino Ethernet all-in-one), a SQL database (to store and log values) and then plotting them to the open source FLOT graphing system.The results are very good.Initially we are using a DHT22 temperature and humidiy sensor, but the sensor can be anything you choose of course.Here is an example
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