Why zigbee devices gets disconnected

[Nargzul]

Hi,

I’ve a a zigbee network with already a good amount of devices. I’m using the HA sky connect(with the extension cable).

I’ve 1 main nodes with a few other router(mostly ikea tradfri + aeotec Range extender Zi). But for some reason, even my router get disconnected, while another sensor, just 3m for it get disconnected.
When I reconnect them, they instantanly get found with ~120LQI, so what might be the reasons they get disconnected after?

I understand the notion of week signal, but in my situation, it doesn’t seems to make sense.

I’ve also other devices on battery with the same erratic behavior. I just installed 2 brand new door sensor. they are like 2m appart. One has a 220LQI, the other has just lost the connection to the coordinator.

I’m quite lost with zigbee

[Didgeridrew]

There are a couple good explainers in the Cookbook Index.

Is Zigbee right for you?

What is this post for? More people are coming fresh to Home Assistant (and the Forum) after buying either a Yellow or a Green plus SkyConnect. When they want to add a few sensors, Zigbee seems the obvious choice - but it may not be the best option. Building a reliable Zigbee network can involve a considerable amount of time and expense, both of which may be unnecessary just to connect A to B. This post is intended to clarify what Zigbee is good at… and what it does less well. Zigbee is not wi…

It might be helpful if you could expand on what you mean by “a few other routers”. I had similar connectivity issues when I first started with Zigbee devices. Those issues were solved by adding routers to the mesh.

[Nargzul]

I’ve a small house with one basement and 2 floors. my coordinator is on the middle level, I’ve, exactly below and above, one aeotec range extender.

In each floor, I’ve then additionally 2 to 3 ikea tradfri outlets + some sonoff ZBMini.