Extend the light sensor notification system in the previous tutorial to allow real time monitoring of electricity usage and get updates of current prepaid electricity level on request.
This project makes use of a Raspberry Pi and Arduino shield in conjunction with the Clickatell HTTP API to monitor your electricity usage and give your current electricity level on request.
For a full rundown on how to build this project from start to finish, please look at the pdf doc included. It is also advised that you look at the previous tutorial for the project basics.