Regarding BLE Mesh Model Publish & Subscribe

RE: Regarding BLE Mesh Model Publish & Subscribe

Joakim Jakobsen — Thu, 07 May 2020 02:09:12 GMT

I'm not really sure if I understand the question here.

If you have configured periodic publishing, it should publish the message at the given, defined period.
I want to emphasise that you don't have to use periodic publication if you only want to send messages on, i.e user interaction.

Br,
Joakim

RE: Regarding BLE Mesh Model Publish & Subscribe

Anupam Roy — Fri, 01 May 2020 03:05:06 GMT

Hi Joakim,

Thanks for the clarification. One last question based on the below example.

Example:

1. Generic OnOffclient sets light state ON to OFF to the Generic OnOff Server.

2. Generic OnOff Server sends Unicast status to Generic OnOff client.

3. Generic OnOffServer publishes unsolicited *status* to the publish address

In step#3, If the publication is set in the Generic OnOffServer,

- Does it become mandatory to publish the unsolicited *status* messages by the server?

- Does it become mandatory to publish the unsolicted *status* messages periodically as per publication period?

RE: Regarding BLE Mesh Model Publish & Subscribe

Joakim Jakobsen — Wed, 29 Apr 2020 10:37:02 GMT

Ah. No you can still send messages on, i.e user interaction.
Periodic publish will be handled by the application, yes. This will not happen automatically in every mesh node. You will need to enable this feature yourself.

Best regards,
Joakim

RE: Regarding BLE Mesh Model Publish & Subscribe

Anupam Roy — Tue, 28 Apr 2020 13:00:45 GMT

>>Not sure if I understand the question. If you are using periodic publication your device will publish the message at the defined intervals, yes.

What I mean is, *if* periodic publication is set in Generic OnOff client, does it become mandatory to follow periodic publishing when sending *Get* / *Set* messages?

I believe, periodic publishing will not happen automatically by the device. It is application's responsibility to do periodic publishing. Please correct me if I am wrong!

BR,

RE: Regarding BLE Mesh Model Publish & Subscribe

Joakim Jakobsen — Mon, 27 Apr 2020 10:18:42 GMT

Hi.

Not sure if I understand the question. If you are using periodic publication your device will publish the message at the defined intervals, yes.

There is no requirement to use periodic publication. You can also send messages on user interaction etc.

Best regards,
Joakim

RE: Regarding BLE Mesh Model Publish & Subscribe

Anupam Roy — Fri, 24 Apr 2020 19:10:16 GMT

Hi Joakim,

Thanks for your reply. Ok, i got that sending and publishing are same in terms of ADV bearer.

Then i have another question..as follows..

Suppose, If config server sets a publication period while configuring a simple Generic OnOff client, then *sending* or *publishing* a "Get" or a "Set" light state message also needs to follow the publish period? Meaning an OnOff client application need to continously send or publish the Get/Set message to the publish address?

I could not find any such guideline in spec. Profile spec just says, publish period in publication set is used for publishing message. So will that mean, every publish message need to follow it?

BR,

RE: Regarding BLE Mesh Model Publish & Subscribe

Joakim Jakobsen — Fri, 24 Apr 2020 10:34:28 GMT

Hi.

1) Yes, you are correct. Publishing in Mesh is the same as sending a message. BT Mesh isn't connection based, but based on the nodes broadcasting their message to every other node in range, i.e they are publishing their message.

2) If the client should subscribe to any address depends on the usecase. If the client wants to, i.e receive status message from the server, it needs to subscribe to the address the server is publishing to.

Best regards,
Joakim