Unable to configure more that 12 sensor nodes (with addresses greater than 0x000b) using the provisioner example

[Susheel]

Hello,

I am using the provisioner example to provision and configure all my sensor nodes in my project. My use case consists of around 60 sensor nodes. While provisioning and configuring nodes one by one, I noticed that the provisioner is unable to configure nodes with element address greater than 0x000b. All nodes with addresses till 0x000b get configured successfully.

The configuration fails with the error message "failed to add app-key(err -116 status 32)". This issue can easily be reproduced using the sensor server/client examples and provisioner example. I am using the nrf52840 DK's for the Sensor nodes and a nRF 52-DK as the provisioner. Is there a configuration variable limiting the number of nodes that can be configured? Please advise.

I am using the ncs 1.9.1. I have attached a snapshot of the log from the provisioner.

P.S I am aware that provisioner example is experimental.

 

[Amanda Hsieh]

Hi, 

Logging shows the issue very clearly. `RPL is full`. If you want to configure the whole network(60 nodes) from one device then this device (provisioner) should have an RPL size of at least 60 entries. You should set `CONFIG_BT_MESH_CRPL` option to 60 or more.

Regards,
Amana H.

[Susheel]

Thank you, Amanda. this indeed fixed the issue. Could you point me to any documentation relating to 'RPL'. I'd like to understand what this is and how this affects the system.

[Amanda Hsieh]

Hi, 

The issue is related to the memory footprint, so take a look at this https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/app_memory.html#bluetooth-mesh For RPL, check out https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/connectivity/bluetooth/api/mesh/core.html#replay-protection-list 

-Amanda H.