Pluviara is a flood alert system developed by 15 Computer Science and Computer Engineering undergrads - myself included - during the second semester of 2011. This project was made for a Development Project course in which we had to come up with a marketable idea which we, as a simulated startup company, would eventually fully develop into a finished product.
The system had quite a broad scope, developing from scratch low-level hardware up to high-level user interface. Some technologies used: Arduino, GSM, C, Java, Android, MySQL, HTML, CSS. I was responsible for the Android development.
Our work received a 99% score from the professors.
Our home town, Recife, is known to have flooding issues every Winter, when there are heavy rains. With that in mind, we devised a flood alert system where our company would spread water-sensing poles throughout the most vulnerable points of the city. Those sensors would be equipped with a wireless communication device (GSM) and would regularly send our company their water levels. Our server would process those water levels and feed our users with that information through a Web and a mobile (Android) interface.
Here's a video showing the Android app in action. Please feel free to contact me if you wish to know more about the system.