My wife is working on a green roof research project and needs to log temperature and humidity data at 8-12 outdoor locations. When I heard how much the data loggers they want to use cost and how limited the hardware and software is, I couldn't help but think there had to be a better, cheaper way. Measuring and logging temperature and humidity data is fairly straight forward, and making a small, watertight enclosure should be fairly trivial as well. This project is my attempt to at least cut the project cost in half.