Zigbee radios: When do they re-acquire a coordinator?

XBee & XBee Gateway
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1

I need Zigbee help! I have some DIGI Zigbee radios that associate with a nearby router, and through that to a more distant coordinator. The endpoints sometimes associate with the coordinator by mistake which eats their batteries (coordinator is out-of-range so the radio struggles). How can I guarantee that the endpoints will associate with the repeater and not the coordinator? Also, will powering down the router for a while cause the endpoints to re-associate with the repeater?

I was told that the endpoints will associate with the STRONGEST signal if there are multiple possible associations to be made, but I am not seeing that it is true. Does anyone know?

Thanks in advance for any help!

2

You can do that by disabling Joining on the Coordinator. That is done by setting NJ to 0.

3

mvut - Thanks for that info. Let’s say that I have all the nodes associated as I want them, then I set NJ = 0 on the coordinator, and then power fails and comes back on. Will the endpoints re-a€ssociate and potentially find the wrong node to join with? Will the repeater node re-associate with the coordinator as it was before the power failed if NJ is set to zero? That is what I am worried about if I set NJ=0 - that they won’t be able to reconnect after power failure.
Thanks for your help!
Chris