# XBEE ZB End Device not joining network

**URL:** https://forums.digi.com/t/xbee-zb-end-device-not-joining-network/18960
**Category:** XBee & XBee Gateway
**Tags:** xbee, pro, s2
**Created:** [November 30, 2017, 11:47am UTC](https://forums.digi.com/t/xbee-zb-end-device-not-joining-network/18960 "2017-11-30T11:47:07Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![ch123](https://avatars.discourse-cdn.com/v4/letter/c/ad7895/32.png) [@ch123](https://forums.digi.com/u/ch123)
#### Post date: [November 30, 2017, 11:47am UTC](https://forums.digi.com/t/xbee-zb-end-device-not-joining-network/18960/1 "2017-11-30T11:47:07Z")

</div>

I have 3 nos of XBEE PRO S2 radios. I have configured them as coordinator, router and end device respectively by changing their firmware using X-CTU.

Coordinator: XBP24-ZB, 21A7, API2  
Router: XBP24-ZB, 23A7, API2  
End Device: XBP24-ZB, 29A7, API2

ID, SC, ZS, Security n all necessary parameters are same for all three.  
For Coordinator & Router joining is permitted.  
Coordinator and router is connected with good LQI on both side (255/255).  
End device is not joining the network.  
Coordinator —\> End Device LQI: 255  
End Device ----\> Coordinator LQI: ??

I’m really stuck with this. Could anyone help me out?