524aa351_BlueSMiRF___learn_sparkfun_com__Input__Output__Power_
[Pin Label] RTS-O [Pin Function] Request to send [Description] RTS is used for hardware flow control in some serial interfaces. This output is not critical for simple serial communication. [Input, Output, Power?] 
Output
O u t p u t
I n p u t
P o w e r I n
Using the BlueSMiRF - learn.sparkfun.com
Input, Output, Power?