Dear Sirs,
My customer produces ZigBee networking device with CC2530 inside.
Customer has unstable network when more than 80 nodes are connected in one ZigBee network.
Here is problem description:
ZigBee device based on CC2530. CC2530 has UART connection to the host processor. Our ZigBee network works fine up to 80 devices (with one network security key). If the small network was built up and running, everything is fine. But it is impossible to build a network of more than 80 devices.
a) new device could not be connected if when we have 90 devices in a network. The new device tries to log into the network, but stack returns "reject".
b) if several nodes are switched ON-OFF several times (power cycling) then one day the network stops to let them to reconnect back.
c) the worst case - when we turn off Coordinator and then switch it ON again, coordinator's host-processor could get “The network is alredy exist” answer from the Zigbee-stack and our Coordinator can’t work further in his own network
We have already implemented recommendations from AN123/swra427b (how to configure the stack in right way) - it really helped in some extent.
We have a large test network (hundreds of devices) and the problem is reproducible on 100%.
It looks like ZigBee Stack SW problem, so I will appriciate for any suggestion how to overcome this problem.
