Once you have your shield soldered up you can use the RTC and SD card for logging time-stamped data.

• The Real Time Clock (RTC) - what it is and how to use it!
• The SD card - Preparation for writing the the SD card
• Fridgelogger - An example project showing (nearly) everything you'll need to know about getting data, and writing it to the SD card
• A detailed walkthrough of the final sketch used in the fridgelogger - a really good idea to read for information on why things are done