# \#arduino-x-ctu-xbee-l

**URL:** https://forums.digi.com/tag/arduino-x-ctu-xbee-l/380.md

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## [Why are 2 XBees failing to associate properly and hence causing an Arduino to lock up?](https://forums.digi.com/t/why-are-2-xbees-failing-to-associate-properly-and-hence-causing-an-arduino-to-lock-up/11473)

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**Author:** [@kiwibird](https://forums.digi.com/u/kiwibird)\
**Replies:** 1\
**Last updated:** [May 13, 2013, 7:51am UTC](https://forums.digi.com/t/why-are-2-xbees-failing-to-associate-properly-and-hence-causing-an-arduino-to-lock-up/11473 "2013-05-13T07:51:44Z")

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Hi, I am creating a project which requires communication between 2 XBee radios. My setup is as follows: 2 x Arduino Leonardos 2 x XBee series2 (X24Z i believe) 2 x XBee shields Anyway, I used X-CTU to configure one …