# Zigbee routes gone after upgrade to v5 rc38

**URL:** https://community.homey.app/t/zigbee-routes-gone-after-upgrade-to-v5-rc38/37428
**Category:** Questions & Help
**Tags:** zigbee, tools
**Created:** [November 15, 2020, 7:55pm UTC](https://community.homey.app/t/zigbee-routes-gone-after-upgrade-to-v5-rc38/37428 "2020-11-15T19:55:01Z")
**Posts on this page:** 4
**Page:** 2

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### Author: ![Eternity](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eternity/32/102113_2.png) [@Eternity](https://community.homey.app/u/Eternity)
#### Post date: [March 21, 2021, 10:29am UTC](https://community.homey.app/t/zigbee-routes-gone-after-upgrade-to-v5-rc38/37428/21 "2021-03-21T10:29:58Z")

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> [@anCnoc](#):
>
> Please let me know if you find a solution which does not mean a complete reset of zigbee.

I decided to reset mij zigbee network. After that, I added all 4 routers first, and end devices later.

The good news?  
In developers I see all devices and the routers are ‘routing’.

The bad news?  
I had hope that resetting zigbee would finally solve the cpu overloading (often \>200% and losing wifi connection to Homey). That is still happening ☹

I have contacted Athom support and they are looking into this case. Hope to hear more on Monday.

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### Author: ![anCnoc](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ancnoc/32/19097_2.png) [@anCnoc](https://community.homey.app/u/anCnoc)
#### Post date: [March 25, 2021, 9:50pm UTC](https://community.homey.app/t/zigbee-routes-gone-after-upgrade-to-v5-rc38/37428/22 "2021-03-25T21:50:39Z")

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I finally reset my Zigbee network, too. It was much less work than expected.

- connecting new devices to v5-Zigbee works a lot faster than before
- most of my Zigbee devices are (Aqara) sensors and in my flows I use groups of sensors, so I didn’t have to fix the flows, just look for the groups
- the group app did recognize the sensors after reconnecting

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### Author: ![Benny\_Ng](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/benny_ng/32/13293_2.png) [@Benny\_Ng](https://community.homey.app/u/Benny_Ng)
#### Post date: [March 26, 2021, 5:41am UTC](https://community.homey.app/t/zigbee-routes-gone-after-upgrade-to-v5-rc38/37428/23 "2021-03-26T05:41:22Z")

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I came across an interesting article why our zigbee network seems to go crazy after the 5.0.0 update. It’s due to a change in the network key that was in the current Zigbee devices. Hope this is useful for those interested.

[https://yougottahackthat.com/blog/1260/athom-homey-security-static-and-well-known-keys-cve-2020-28952](https://yougottahackthat.com/blog/1260/athom-homey-security-static-and-well-known-keys-cve-2020-28952)

Cheers,

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### Author: ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)
#### Post date: [March 26, 2021, 6:02am UTC](https://community.homey.app/t/zigbee-routes-gone-after-upgrade-to-v5-rc38/37428/24 "2021-03-26T06:02:08Z")

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The “well-known” key apparently only gets generated when you do a Zigbee reset. My Homey, running 5.0.4, is still using the known key:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/5/b/5b74ba3c05220276f292a2e4a36e162ab2284515.png)

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