Initially the sensor nodes were using the RF24 and RF24Network only. The current version uses the ChibiOS Real-Time Operating System and the "Narcoleptic" library to put the ATMega328P into deep-sleep when not transmitting and to allow multi-tasking.
By August 20th you must have the following:
- A video. It should be less than 2 minutes long describing your project. Put it on YouTube (or Youku), and add a link to it on your project page. This is done by editing your project (edit link is at the top of your project page) and adding it as an "External Link"
- At least 4 Project Logs
- A system design document
- Links to code repositories, and remember to mention any licenses or permissions needed for your project. For example, if you are using software libraries you need to document that information.
You should also try to highlight how your project is 'Connected' and 'Open' in the details and video.
There are a couple of tutorial video's with more info here: http://hackaday.com/2014/07/26/4-minutes-to-entry/
Good luck!