From a post in the Home Assistant Cookbook:
Not many people know that... A random collection of Zigbee trivia
The ZHA “network visualisation” was originally a dashboard card. It was absorbed into ZHA and the card is now deprecated, but the repository is still on Github.
The lines on the map show every route between nodes that Zigbee has discovered - not just the ones it is using. They are colour coded according to their LQI:
- Green >192
- Yellow 129-192
- Red 80-128
- Grey < 80
The map is a snapshot. It will be different each time you generate it.
There are two numbers on each link because messages pass in both directions. A value is supplied by the router at each end of the hop.
It is normal to see nodes on the map that don’t have a link to anything else. These are usually end devices and they’re probably sleeping to conserve battery. They will wake immediately if one of their sensors is triggered, and in any event they should wake periodically to check in with their parent router. A router with no connections is unavailable, which may indicate a problem.