# Is CTS on the SB6 (WIFI) an Input or Output

**URL:** <https://forums.digi.com/t/is-cts-on-the-sb6-wifi-an-input-or-output/12325>\
**Category:** XBee - WiFi\
**Tags:** serial-interface, wifi, xbee\
**Created:** [December 30, 2013, 12:25am UTC](https://forums.digi.com/t/is-cts-on-the-sb6-wifi-an-input-or-output/12325 "2013-12-30T00:25:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MrSmith](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@MrSmith](https://forums.digi.com/u/MrSmith)\
**Post date:** [December 30, 2013, 12:25am UTC](https://forums.digi.com/t/is-cts-on-the-sb6-wifi-an-input-or-output/12325/1 "2013-12-30T00:25:34Z")

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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.

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**Author:** ![trooper2](https://avatars.discourse-cdn.com/v4/letter/t/edb3f5/32.png) [@trooper2](https://forums.digi.com/u/trooper2)\
**Post date:** [December 30, 2013, 5:09pm UTC](https://forums.digi.com/t/is-cts-on-the-sb6-wifi-an-input-or-output/12325/2 "2013-12-30T17:09:06Z")

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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](http://ftp1.digi.com/support/documentation/90002180_G.pdf).