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Thread mesh network capacity problem

Hi!

I have questions for Nordic developers team. What capacity of network is possible with nrf52840 thread mesh? I've tried to attach large amount of nodes to mesh and it collapsed with about ~20 devices. I mean that devices could not connect to mesh. In case of nrf52840-PDK led indicator starts to blink very strange while attempting to connect. Is there any parameters in library to change that can improve capacity of network?

My set: nRF52840+Thread sdk v0.10

Best regards, Wojciech Rzepecki image description

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  • Hi Wojciech,

    Thank you for the detailed answers. It seems that are indeed some issues with running bigger mesh networks with SDK 0.10.0. I was able to observe it as well.

    As there were many bugfixes between 0.10.0 and 0.11.0 instead of troubleshooting an older release I performed the same test with a newer one. To speed up testing I flashed one node with the CLI for TTM and remaining ones with simple_coap_server as they join the network on their own. I flashed five kits, waited for 20s and flashed another five. To make sure I used over 30 kits.

    Please see attached TTM screen. image description

    Could you try 0.11.0 with your application?

    Kind regards, Piotr Szkotak

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  • Hi Wojciech,

    Thank you for the detailed answers. It seems that are indeed some issues with running bigger mesh networks with SDK 0.10.0. I was able to observe it as well.

    As there were many bugfixes between 0.10.0 and 0.11.0 instead of troubleshooting an older release I performed the same test with a newer one. To speed up testing I flashed one node with the CLI for TTM and remaining ones with simple_coap_server as they join the network on their own. I flashed five kits, waited for 20s and flashed another five. To make sure I used over 30 kits.

    Please see attached TTM screen. image description

    Could you try 0.11.0 with your application?

    Kind regards, Piotr Szkotak

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