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How CSMA/CA works on XBee?

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I'm trying to implement S-MAC protocol on waspmote xbee sensors and i know it has its own CSMA/CA. So first of all I need to understand the basic of xBee collision avoidance. Two senders set up in api mode in libraries and both periodically sending single bytes to a common receiver. I reduce the delay and many changing in libabries to make collision and to see how algorithm works. But when i monitor data at the receiver all looks as expected at the receiver .. byte1, byte 2 .. byte1, byte2. Do u have any idea how can i make collision? and is it possible to modify xbee module firmware?
asked Jan 31, 2016 in XBee Programmable Development by gizemneb New to the Community (0 points)

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1 Answer

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CSMA/CA is available on XBee 802.15.4 S1 modules. It can be disabled/enabled using "RN" parameter.

But remember that these modules (802.15.4) implements minimum retries as well and will make your job very difficult.
answered Feb 1, 2016 by asgm Veteran of the Digi Community (1,499 points)
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