Change PAN ID and disassociation packet in ZigBee

Question

I tried to change ZigBee's PAN ID and node discovery, but as soon as I changed its PAN ID, I received a modem status packet (0x03) that apparently described disassociation. After that, I send ATND command for node discovery, and I got modem status (0x06) -- coordinator start, but no discovery result.

I found that if I send any ATND command again after first ATND command, it worked as I expected. Why was a disassociation packet received from ZigBee after I changed the PAN ID?

Answer 1

When you change the PAN ID on a coordinator, it's shutting down one network (disassociation) and then creating another (coordinator started). You then need to wait for nodes to join that new network before you can discover them. It doesn't make sense to perform node discovery on a device that isn't currently joined to a network.

If you set ATJN to 1 on the coordinator, the host will receive Join Notification frames (type 0xA5) as devices join the network. Maybe this is what you're looking for?