Zigbee maximum device number

[abe]

Hi, I'm using nRF5_SDK_for_Thread_and_Zigbee_v3.1.0_c7c4730 to develop a Zigbee Network.
I'm using the ble_zigbee_template example as starting point of my works.
I seen that the Zigbee stack is able to store permanently the network data of each device connected (to delete it user must connect pin 1.09 to GND during startup).
My questions:
- how many Zigbee node can store? I need to have until 250 node stored.
- what's the address of FLASH storage for these data?
Many thanks for help
Kind Regards

Abele

[Edvin]

Hello Abele,

I had to forward this question to our Zigbee team. I should have noticed you, but I haven't received any response yet.

Just some background:

I believe (waiting for confirmation) that this is stored similarly to FDS, so it will not be a specific flash address containing the addresses and routing tables for each node. It is most likely a dynamic handling of this data.

I see that on the nRF52840 there are some data stored in two locations:

One chunk on 0x000F7000 and one chunk on 0x000FB000. Do you need more information regarding the address than this? If so, what?

I am waiting for an answer regarding the number of nodes that can be stored.

[abe]

Hello Edvin
Thanks for answer, for further requests I will wait the info about the maximum # nodes can stored.

[abe]

Have you any further new about?

[Edvin]

Hello,

Sorry. I have not received any response. I have pinged the internal ticket. I'll keep this ticket open until I receive a response from the Zigbee team. I am sorry for the delay.

Best regards,

Edvin

[Edvin]

Hello,

Are you implementing a router device, or a coordinator? The memory usage is dependent on this. 

Some links that may be helpful regarding memory layout and configuration:

Layout: https://infocenter.nordicsemi.com/topic/sdk_tz_v3.1.0/zigbee_hw_and_mem.html

Configuration: https://infocenter.nordicsemi.com/topic/sdk_tz_v3.1.0/zigbee_mem_cfg_ram_feature.html

[abe]

Hello Edvin,
I know the links you sent me, they are helpful to understanding the structure of memory usage.
But I will like anyway to know the maximum # nodes can stored without any change on ble_zigbee_template from nRF5_SDK_for_Thread_and_Zigbee_v3.1.0_c7c4730 I used as starting point for my application.
Many thanks
Abele

[Edvin]

Hello Abele,

The question on whether you were implementing a router node or a coordinator node was a question that I received from the zigbee team. The amount of storage that is required per node depends on this. So are you developing a router node or a coordinator?

BR,

Edvin

[abe]

I apologize, in my last post I have miss this detail. I'm developing a coordinator

[abe]

Hello Edvin, any news for me?

[Edvin]

Sorry. Not yet. I pinged the internal ticket yesterday. I'll keep you posted.

[abe]

News??

[Edvin]

Hello,

I am sorry for the late reply. I received this today:

Q: What's the address of FLASH storage for these data?

A: Zigbee storage is placed at the end of the Flash, start address depends on:

• Amount of flash available at given chip
• Size of flash to be used by the Zigbee stack

Q: How many Zigbee node can store? I need to have until 250 node stored.

A: From looking at docs I can see limitation of 200 nodes. Ble_zigbee_template includes zb_mem_config_med.h which indicates network size of 32 nodes (taken directly from zb_mem_config.h, also available in Infocenter ).

Are there any further questions from the customer?

So it doesn't look like there is possible to store 250 nodes, unfortunately.

This is due to memory restrictions.