Here is my current project and entry for the Hackaday Prize:
http://hackaday.io/project/2375-Garden_automation_and_sensor_network
The main purpose originally was to have temperature monitoring of a small outdoor greenhouse, but then I decided to expand it from there. For more info look into the project page via the link above.
Description originally from my hackaday projects page:
This is a project to create a small network of sensors in the garden, and possibly some automation. The sensor data will be logged on an embedded Linux server (probably a Raspberry Pi or BeagleBone)