Thread mesh network capacity problem

[Wojtek]

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

[Piotr Szkotak]

Hi Wojtek,

Thank you for your interest in Thread SDK, your setup is pretty impressive. Let's try to confirm some basics before we start to dig deeper.

Could you confirm which SDK is used (0.10.0 or 0.11.0)?

How many routers and how many childs are in your setup? Please note that by default in OpenThread a single router supports up to 10 children. Library would need to be recompiled with changed OPENTHREAD_CONFIG_MAX_CHILDREN define.

If this is not your case is it possible for you to share screen from the TTM and wireshark capture?

Do you connect all nodes at once to the network?

Did you observe any correlation between order in which you power on nodes and the maximum number of nodes supported in your case?

Kind regards, Piotr Szkotak