How to set & use relay node for sending message (from client to server)

[kmsmile2]

* nRF5 SDK: nRF5_SDK_17.0.0_9d13099

* nRF5 Mesh: nrf5_SDK_for_Mesh_v4.1.0_src

* example: nRF Mesh light example (Client, Server, Provisioner)

Client ------------- Relay node ------------- Relay node ------------- Server

(Server is so far from Client.

The only method that Client can control Server is using two relay node.)

1. Setting

Is there way to set Server as Relay node?

Can I set the server as Relay node if I want to do?

2. Use

How to use the relay node?

[Didrik Rokhaug]

Hi.

At the moment, all our BLE mesh experts are on summer vacation, but I'll do my best to help until they are back.

After looking through the mesh SDK (v4.2), I found the following define in nrf_mesh_config_core.h:

#define MESH_FEATURE_RELAY_ENABELED (1)

If I have understood the code correctly, a node will act as a relay automatically as long as that define is set (= 1).

Best regards,

Didrik

[kmsmile2]

Thank you for reply, Didrik.

I checked it and it is already set '1' as you said

If 4 boards are in same place (close place), how can I set them if I want to see the action of relay node?

I just want it to run basic system of mesh network which are consist of only Client, Server, Relay node...!

If I can see the basic system of mesh network, other example is okay. Please just let me know... :)

  

[Didrik Rokhaug]

After looking at the Mesh SDK some more, I also found this function: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.meshsdk.v4.2.0%2Fgroup__CONFIG__CLIENT.html&anchor=gaaebf717a5ccb06b8c284a315d5d138c7

That might also help you.

 

kmsmile2 said:

If 4 boards are in same place (close place), how can I set them if I want to see the action of relay node?

 The most certain way to verify that relaying works is probably to place the source and destination devices out of range from each other, and place the relay in between so that it is in range of both.

However, you might also be able to enable logging on the relay node which might be used to verify that it is working. In that case, it should be OK to have all three devices close together. That will make the relay node unnecessary, but it should still relay the message, even though the relayed message will be ignored by the destination (as it is a duplicate of the message from the source).