I had a friend who has an application where he just wanted a single piece of data recorded and transmitted.
SO I built him a button:
http://www.cupidcontrols.com/2014/12/push-button-rf-data-transmitter/
C
Very nice as usual ;)
Thanks buddy. These projects are fun. I have more micros than I do apps, so if you think of new ones, drop me a line!