Relay Configuration and implementation in BLE mesh network

[Jeena Francis]

I am trying to implement the following: I have a mesh node built using the Sensor Server  example for publishing temperature data. I want one relay node to transmit the temperature data to another node, which is not within the radio range of the first node. This second node is built using the Sensor Client model. My question is: how do I implement the relay feature, which code should I use for that, and what changes need to be made?

[Hung Bui]

Hi Jeena, 

By default most of mesh sample has the relay feature enable. You don't have to do anything except from having CONFIG_BT_MESH_RELAY=y (by default in many samples)

If you don't want to have relay feature enabled, just set CONFIG_BT_MESH_RELAY=n in prj.conf

[Jeena Francis]

Do I need to make any changes in the BLE Mesh app?

[Jeena Francis]

For my relay node, I flashed the Sensor Server example. Which element is configured, and do I need to set the publish and subscribe addresses, publish TTL, publish retransmission count, and interval?

[Hung Bui]

Hi Jeena, 

Jeena Francis said:

Do I need to make any changes in the BLE Mesh app?

 The relay role is also can be configured from the BLE Mesh app. You can access the configuration  server and turn off and on relay feature. (you would need to do a reload to load the current value before you change it)

Jeena Francis said:

Which element is configured, and do I need to set the publish and subscribe addresses, publish TTL, publish retransmission count, and interval?

As far as I know it's preconfigured. But you can change them in the configuration server (in the primary element) 

[Jeena Francis]

I want to send a custom message using a custom Property ID added to the Mesh Sensor observer example. How do I add a custom Property ID? Currently, I am using #define CUSTOM_ID 0x1234. The message is sent from the server side but does not trigger the callback on the client side. What changes need to be made?

[Hung Bui]

Hi Jeena, 
The new question is not related to the original one. I would suggest to create a new ticket. 

[Jeena Francis]

OK.Thank You 

[Jeena Francis]

Hi,

In the app, the relay setting is disabled. I have attached a image for reference.

[Hung Bui]

Hi, 
You need to connect to a mesh node before you can control that. 
Have you made sure CONFIG_BT_MESH_RELAY=y in the prj.conf  ?