Carriots is a platform focused on talking to embedded devices. Data collection is an obvious strong point of a platform like this. Here is a project using Carriots, an Arduino, Raspberry Pi, and a water flow meter to monitor water usage on a gardening system.
The tutorial is broken up in to part1 and part2. Source code included. Part 1 primarily focuses on setting up and configuring, using python on the Pi to communicate to the Arduino, and the flow meter sensor is then read by the Arduino. Part 2 is dealing with the data collected which includes graphing.
While I’m no green-thumb, I’m not sure how practical this particular application is I can see the usefulness when generating a larger sensor node collection system.