How to extend one BLE-Mesh model's functionality to another.?

RE: How to extend one BLE-Mesh model's functionality to another.?

Mttrinh — Fri, 06 May 2022 13:21:54 GMT

Hi,

It seems to have been some confusion. Chat client doesn't extend health server. They are just instantiated on the same element. The extended models will share a subscription list and this is the only thing that the mesh stack will handle for you. This is done through bt_mesh_model_extend API. Sharing a message behaviour is up to implementer. E.g. in nRF Connect SDK we do it through callbacks. For example, you can look at Generic Level and Generic Power Level servers implementation, where Generic Power Level Server models implements callbacks of Generic Level Server model to intercept Generic Level messages.

Regadring the questions:

1. No, you can't do that. There is no such API in health server. You need to have a health client on the same device and use bt_mesh_health_attention_set API to do that. And you need to call this API from chat model message handler.
2. As mentioned above, it is up to implementor. We use callbacks to propagate message data.
3. Send a message to a base model. If a model is extended, this should trigger behaviour of the model that extends this one. E.g. if you send a message to a Generic Level Server model, when it is extended by Generic Power Level model, this will change Generic Power Level state value.

RE: How to extend one BLE-Mesh model's functionality to another.?

Ubaid_M — Wed, 04 May 2022 11:44:54 GMT

Hi,

[quote userid="15475" url="~/f/nordic-q-a/87555/how-to-extend-one-ble-mesh-model-s-functionality-to-another/366192#366192"]

Chat Client Model

Chat sample walk-through

Vendor model development overview

[/quote]

These absolutely have no data regarding model extension.

[quote userid="108934" url="~/f/nordic-q-a/87555/how-to-extend-one-ble-mesh-model-s-functionality-to-another"]

My questions are:

1. Suppose I want to call attention on when a chat message is received. How do I do this & what changes I need to make in code..?

2. In my custom models, how do exchange data between models..?

3. How do I trigger an extending model API from the main model API..?

[/quote]

I am looking for code changes, I am aware of the theory on extension.

As an example, help me with an use case, suppose i want to trigger attention On API (From health model) when I receive a chat message (In chat client model), How can I do so..?

I am aware of the initial loop, looking more towards API changes now.

Thanks,

RE: How to extend one BLE-Mesh model's functionality to another.?

Mttrinh — Wed, 04 May 2022 11:29:39 GMT

Hi,

What version of the SDK are you using?

I would recommend you to look through these documentation:

Chat Client Model

Chat sample walk-through

Vendor model development overview

Also have a look at this thread.