The Arduino platform is great for interfacing with all manner of sensors, interpreting data and sending it to the Internet for further analysis. One example of this has been documented by Shane French who has created an fuel tank monitor that sends the level via short range wireless to an Ethernet-enabled Arduino - which then uploads the data to a hosted web page.
The levels in the fuel tank are taken with an ultrasonic distance sensor, and the volume of the tank can be determined by the level of the fuel and geometry in the Arduino sketch. The sensor side of the project also runs using very little power, thanks to the Arduino LowPower library.
Overall this is an interesting project, thanks to the detail in not only the hardwre and software, but also the issues that were overcome to create a sucessful device. To learn more, visit Shane's website. And for more, we're on facebook, twitter and Google+, so follow us for news and product updates as well.
When putting together your next Internet-enabled Arduino project - save time, space and money with the Freetronics EtherTen. Apart from being fully Arduino Uno-compatible, it has onboard Ethernet, microSD socket, full USB interface (so you don't need a costly FTDI cable just to upload a sketch!) and supports optional Power-over-Ethernet.