Large Network of 240+ Nodes

Michael Roberts

Other Parts Discussed in Thread: CC2530, CC2538, Z-STACK

Hi all,

I read through the latest application report AN123 on breaking the 400+ node network barrier. After increasing MAX_RTG_SRC_ENTRIES to 240+, our CC2530 platform was out of memory. The largest number of entries the CC2530 would support was 135.

The solution at this point is to either add a coprocessor (MSP430) or use the CC2538 for the concentrator.

On a live network with 240+ nodes, what is the best means to port the concentrator from a CC2530 platform to a CC2538 platform and maintain the integrity of the network? Currently, we can clone the CC2530 coordinator in case of a failure, but I would imagine that writing this data back to the CC2538 would be futile, since the non-volatile flash would be structured differently on the CC2538.

Also, on a side note does the CC2538 support OAD (Over-Air-Download)?

Any experience on this or suggestions would be appreciated. Thanks.

over 12 years ago

0 Michael Roberts over 12 years ago

Intellectual 745 points

...

0 YiKai Chen over 12 years ago

Guru 735695 points

What is the defined number of your MAX_CHILDREN and MAX_ROUTERS values? As I know, the test runs in AN123 using CC2530.

0 Michael Roberts over 12 years ago in reply to YiKai Chen

Intellectual 745 points

Not sure how this relates to my question.

0 YiKai Chen over 12 years ago in reply to Michael Roberts

Guru 735695 points

The max number of devices in a zigbee network can be calculated by MAX_CHILDREN and MAX_ROUTERS values. I just try to help you.

0 TheDarkSide over 12 years ago in reply to YiKai Chen

TI__Genius 16570 points

Hi,

I am afraid you would have to restart the system and rebuild the routing table at the concentrator.

Routing tables are stored in RAM and not in NV so you can't clone by simply transferring the NV area.
What you can do is to configure the new concentrator as router and hard code the PANID of the existing network. Then you have him joining the existing network (you need to open it for a brief period of time to allow him joining) and start building the source routing table sending Many-to-one route requests.

Unfortunately, we dismissed OAD support on 2538. This platform only supports OTA.

Thanks,

TheDarkSide

0 Bagiradan Sharma over 12 years ago in reply to TheDarkSide

Intellectual 820 points

Dear Darkside,

Can u suggest me how to use OTA in CC2538. I just want to update the firmware through OTA. I will be thankful if u give me suggestion.

0 TheDarkSide over 12 years ago in reply to Bagiradan Sharma

TI__Genius 16570 points

Hi,

please take a look at the Z-stack OTA Upgrade User's guide that you can find in the C:\Texas Instruments\Z-Stack Home 1.2.0\Documents folder of your Z-stack Home 1.2.0 install.

Thanks,

TheDarkSide

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Large Network of 240+ Nodes