I discovered strange behaviour and I don´t know if that´s normal ZigBee protocol behaviour or some deCONZ / ConBee 2 or even a ZigBee device issue:
I paired a new switch device. During pairing the only other ZigBee device already being paired (a router (bulb)) was powered on, so the switch was paired with the bulb.
Problem: when bulb disappears (current test setup: bulb is most of the time switched off so not a good router device), the switch is lost. It does NOT connect to the gateway (ConBee 2 stick)!
So I deleted the switch from the gateway and re-paired, this time with the bulb powered off.
a) switch was paired directly with gateway.
b) when bulb was powered on, switch additionally connected to the bulb (two connections: one via gateway, one via bulb)
c) when bulb wa spowered off, switch remained connected to gateway
- When pairing make sure to put the new device as close as possible to the device it will be next to most of the time (in my case: gateway) so it´s more likely it will be paired with that node
- Hard method: power off all router nodes during pairing so it´s guaranteed the new device will be paired with the gateway (first).
I think #2 does not work when you already have a few devices operating. In case their are constantly available router nodes (bulbs or plugs) the mesh technology will take care of all devices staying connected.
So I’m asking myself the initial question: Is that…
a) …normal ZigBee protocol behaviour?
b) …some deCONZ / ConBee 2 specific issue?
c) …a ZigBee device (here: switch) issue?
Update: I might have an idea why the switch was stuck on the bulb (router node): I have put both in a „light group“ (which is probably deCONZ language for a ZigBee group). And I think the behavior in ZigBee groups is different - isn’t it?
By the way
separating wifi channel from ZigBee one AND
using an USB extension cable for the ConBee 2 (not because of interference with the Raspberry Pi it was plugged in - that one uses Ethernet, but because of a WiFi repeater directly next to the Pi)
helped a lot. ConBee 2 covers a pretty huge part of the house as I can see from first tests, no plugs/bulbs as router nodes needed so far.