I am trying to implement hardware flow control for the Xbee wifi device however I don’t know if to cross the CTS and RTS signals. The best way I can determine what to do is to know which is an input and which is an output.
RTS is an input and CTS is an output. See details in Chapter 2 of the user manual http://ftp1.digi.com/support/documentation/90002180_G.pdf.