# Cant add zigbee devices

**URL:** <https://community.homey.app/t/cant-add-zigbee-devices/49739>\
**Category:** Questions & Help\
**Tags:** zigbee\
**Created:** [July 24, 2021, 12:24pm UTC](https://community.homey.app/t/cant-add-zigbee-devices/49739 "2021-07-24T12:24:10Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\
**Post date:** [July 24, 2021, 3:00pm UTC](https://community.homey.app/t/cant-add-zigbee-devices/49739/2 "2021-07-24T15:00:04Z")

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Zigbee & WiFi & Bluetooth

These protocols use the same frequency ranges and can interfere with each other.  
The WiFi and zigbee channel numbers do not match, so it is important to pay attention to which channel numbers you use.  
The WiFi signal is much stronger than zigbee.  
If Bluetooth reception is very poor, you can try changing your WiFi channel.

Also make sure your Hue zigbee channel is different from Homey zigbee.  
Both should not be interfered by your 2,4GHz Wifi frequencies.  
Hue zigbee channel is quite easy to change, _but make sure all hue bridge paired devices are switched on_

Zigbee network and channel no info:

> **[Homey Developer Tools](https://tools.developer.homey.app/tools/zigbee)**

Zigbee & WiFi interference check:

> **[WiFi ZigBee Interference Checker](https://www.ostgardh.se/wifi_zigbee/index.html)**

Explanation:  
[https://support.metageek.com/hc/en-us/articles/203845040-ZigBee-and-WiFi-Coexistence](https://support.metageek.com/hc/en-us/articles/203845040-ZigBee-and-WiFi-Coexistence)

Wi-Fi tips:

> **[Channels 1, 6, 11 — Only](http://wifimetrix.com/channels-1-6-11-only)**

Athom zigbee advice:  
[https://support.athom.com/hc/en-us/articles/360019239879-Advice-on-building-a-stable-Zigbee-network](https://support.athom.com/hc/en-us/articles/360019239879-Advice-on-building-a-stable-Zigbee-network)

Athom recommends using no more than 35-40 Zigbee devices. More is possible, but the network becomes more viscous and devices can fail or function less reliably.

(Aqara) lost connection:

> [@Fixing disconnected Zigbee devices (without having to modify all flows)](https://community.homey.app/t/fixing-disconnected-zigbee-devices-without-having-to-modify-all-flows/37896):
>
> With the release of Homey firmware 5.0.0 some improvements have been made to the Zigbee stack. I experienced some devices that stopped communicating with Homey in previous firmware rc’s. For me most where battery powered Aqara & Xiaomi ZigBee sensors As I didn’t want to have to fix flows I have do the following: Remove the battery for a couple of seconds And/Or start pairing the same device without removing it, just in place where it was mounted. (Not near Homey) you get a [dupicate de…

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