Data Logging with a Netduino Plus 2.
The Dutch 'Smart' electricity meter is equipped with a P1 port that, if triggered, delivers a message every 10 seconds with information on consumed electricity (kWh), delivered electricity (kWh), current usage (kW), current delivery (kW), which tariff is being used and, if a 'Smart' gas meter is connected, gas meter measure (m3).
Also a kWh meter for for example PV logging can be connected via a S0 connection and logged to PVOutput.org and other logging sites. Any other device with a S0 port can be connected.
You can switch devices on and off via a relais.
There is much more in this program, just download and start reading in the manual and on the wiki pages that are delivered with the Web Pages part.
In the Windows Phone Store you will find an App that connects to the Netduino Plus 2 and that is able to read data from PVOutput.org
The creator has an alias: "Willie Wortel" and he has written all of the code so a big applause to him for creating such a great program! The alias Willie Wortel is a very good alias if you can create a project like this
You can find all of it at http://dalue.codeplex.com.
Have fun with it!