Comments on: Zigbee Channels Explained https://www.smarthomeperfected.com/zigbee-channels/ The Ultimate Smart Home Resource! Tue, 30 Apr 2024 21:44:32 +0000 hourly 1 By: Jeff Campbell https://www.smarthomeperfected.com/zigbee-channels/#comment-6773 Mon, 16 May 2022 23:22:29 +0000 https://smarthomeperfected.com/?p=42732---6c957983-8077-4ebf-9110-41060350ff9e#comment-6773 There is a lot of incomplete or inaccurate information in this article. For starters, even though 2.4Ghz WiFi and Zigbee have many overlapping channels the impact of WiFi on Zigbee is, in my experience, negligible. Likewise, the impact of Zigbee on WiFi is also negligible unless you have a very busy Zigbee network. Even then, if Zigbee is operating at the edge of a WiFi channel (example, WiFi 11 and Zigbee 20) the interference will be minimal.

In no particular order…
– 2.4Ghz WiFi channels are 20Mhz wide, not 22.
– 5Ghz WiFi channels can overlap just like 2.4Ghz WiFi channels.
– 2.4Ghz WiFi does not outperform 5Ghz WiFi, unless you happen to be running 20Mhz channels on 5Ghz and 40Mhz channels on 2.4Ghz.
– Two close WiFi APs on the same channel do not actually interfere with each other – they will cooperate to try to avoid simultaneous transmissions. They will impact each other’s speed, but it’s not the same as interference. Two close APs on adjacent channels (like channels 1 and 2) will wreak havoc on each other.
– If the Zigbee channel is changed, most devices will find the new channel all by themselves. It might take anywhere from a few hours to a full day, and it’s possible that some errant devices might have to be excluded and re-added, but to say a manual reset of every device on the network is required is incorrect.

There’s more, but I don’t want to re-write the entire article.
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