# xbee freezes sometimes

**URL:** <https://forums.digi.com/t/xbee-freezes-sometimes/2189>\
**Category:** XBee - Zigbee\
**Created:** [February 12, 2009, 9:21am UTC](https://forums.digi.com/t/xbee-freezes-sometimes/2189 "2009-02-12T09:21:14Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![jofr6](https://avatars.discourse-cdn.com/v4/letter/j/e79b87/32.png) [@jofr6](https://forums.digi.com/u/jofr6)\
**Post date:** [February 12, 2009, 9:21am UTC](https://forums.digi.com/t/xbee-freezes-sometimes/2189/1 "2009-02-12T09:21:14Z")

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Hi,  
I have an application where I use 2 Xbee modules( coord and end).  
The coord is connected with a PC to receive data and store it.  
The end device is build in a small tool which is plugged in to the OBD of a car. A µc reads out data over CANBUS and sends it to the end device which then transmit it to the coord/pc.Afterwards the tools is disconnected (all power gone) and the reconnected to the next car.  
It works fine most of the time but sometimes the coord seems to hang up. It will receive nothing any more. A reset ATFR doesn’t help always after some resets or taking power away from the Coord helps and everything runs again.  
Any Ideas how to solve the problem. (i use unicast)

Jofr6

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**Author:** ![Rocker1446](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/rocker1446/32/21_2.png) [@Rocker1446](https://forums.digi.com/u/Rocker1446)\
**Post date:** [February 12, 2009, 10:34pm UTC](https://forums.digi.com/t/xbee-freezes-sometimes/2189/2 "2009-02-12T22:34:50Z")

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What version of firmware are you running?

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<div class="post-metadata">

**Author:** ![jofr6](https://avatars.discourse-cdn.com/v4/letter/j/e79b87/32.png) [@jofr6](https://forums.digi.com/u/jofr6)\
**Post date:** [February 17, 2009, 8:50am UTC](https://forums.digi.com/t/xbee-freezes-sometimes/2189/3 "2009-02-17T08:50:49Z")

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I use 1220 for the end devices and 1020 as coordinator

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**Author:** ![Admin1](https://avatars.discourse-cdn.com/v4/letter/a/bbce88/32.png) [@Admin1](https://forums.digi.com/u/Admin1)\
**Post date:** [February 17, 2009, 3:35pm UTC](https://forums.digi.com/t/xbee-freezes-sometimes/2189/4 "2009-02-17T15:35:29Z")

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Have you tried updating to ZNet 2.5 rev. 1x47 firmware?  
[http://www.digi.com/support/productdetl.jsp?pid=3261&amp;osvid=0&amp;s=269&amp;tp=2](http://www.digi.com/support/productdetl.jsp?pid=3261&amp;osvid=0&amp;s=269&amp;tp=2)

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**Author:** ![damons](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@damons](https://forums.digi.com/u/damons)\
**Post date:** [February 19, 2009, 3:41am UTC](https://forums.digi.com/t/xbee-freezes-sometimes/2189/5 "2009-02-19T03:41:13Z")

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Or better yet, try updating to ZB firmware 2x41:  
[http://www.digi.com/support/productdetl.jsp?pid=3430&amp;osvid=0&amp;s=365&amp;tp=2](http://www.digi.com/support/productdetl.jsp?pid=3430&amp;osvid=0&amp;s=365&amp;tp=2)