RE: nrf mesh light client group control

AHaug — Wed, 16 Apr 2025 13:06:50 GMT

Hi,

I did some more digging around and I found the Zephyr sample (which was not within the Mesh sample subfolder, which is why I didn't find it). You can see it here: https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/bluetooth/mesh_provisioner. The sample documentation is somewhat limited so you will have to do most of the dissecting from the source code.. https://docs.nordicsemi.com/bundle/ncs-2.9.1/page/zephyr/samples/bluetooth/mesh_provisioner/README.html#ble_mesh_provisioner, but it does showcase some API for provisioning.

Kind regards,
Andreas

RE: nrf mesh light client group control

PiKa PiKa — Tue, 15 Apr 2025 14:05:17 GMT

Hi,

thanks for your reply

so you suggest using nRF Mesh mobile app to create a group and let the server subscribe this group?

It seems that there is currently no API in the nrf connect sdk that allows the client to control the server to

subscribe a specified group right?

RE: nrf mesh light client group control

AHaug — Tue, 15 Apr 2025 12:25:00 GMT

As far as I know there are no samples that explicetly handles this, but there are multiple samples that have servers that can be added to a specific group. My colleague explains it briefly here: Extracting individual address from group address in BLE Mesh i.e

"Group addresses in Bluetooth mesh is not a centralized concept. Models can subscribe to group addresses, and models can publish to group addresses, but there is not central overview of which models are subscribed to what groups.

The provisioner or provisioners of the network may know how the nodes were configured (and thereby what models on what nodes are subscribed to the group address,) but this will not necessarily give a definite answer to what models subscribe to the group address (as nodes may self-configure or otherwise change their configuration without the provisioner knowing. The provisioner must then read the configuration of all the devices to know if anything has changed"

Using the nRF Mesh mobile app you can do this through

Provision your device to the mesh network
Navigate to the server model you want to configure
In the subscriptions section, tap Subscribe
Select an existing group or create a new one
Apply the changes

Among the samples I mentioned:

Bluetooth Mesh: Light switch - This sample can be used to change the state of light sources on other devices within the same mesh network, demonstrating group control through the Generic OnOff Client model. It works together with the Light sample to demonstrate functionality in a Bluetooth Mesh network. Bluetooth Mesh: Light switch
Bluetooth Mesh: Light dimmer and scene selector - This sample demonstrates how to set up a light dimmer and scene selector application, controlling dimmable LEDs with Bluetooth Mesh using Generic Level models, Generic OnOff models, and Scene models. It specifically implements:
- Dimming Control NLC Profile
- Basic Scene Selector NLC Profile Bluetooth Mesh: Light dimmer and scene selector
Bluetooth Mesh: Light fixture - This sample has been updated in various releases to include support for the Scene Server model and demonstrates the use of a Sensor Server model to report additional device information. Bluetooth Mesh: Light fixture

Kind regards,
Andreas