Can a LPN node subscribe message for a group address?

[jowei]

Hi Nordic:

I know mesh LPN can receive messages from it's friend node, that means when any other nodes send messages to LPN unicast address, LPN's friend node will buffer it and send to LPN when LPN poll to him.

But I am not sure if LPN can subscribe message for a group address, so that friend node will also buffer messages to this group and send to LPN when LPN poll to?

Besides, does friend node also buffer message which is sent to 0xffff address and send this message to LPN when LPN poll to him?

If yes, could you also share to me where is the description of this feature in mesh specification v1.0? thanks a lot.

Regards,

Joseph 

[Joakim Jakobsen]

Hi Joseph!

But I am not sure if LPN can subscribe message for a group address, so that friend node will also buffer messages to this group and send to LPN when LPN poll to?

Yes, the LPN will poll messages that is sent to a group address that the LPN is subscribed to.

Besides, does friend node also buffer message which is sent to 0xffff address and send this message to LPN when LPN poll to him?

The LPN should also poll messages sent to 0xFFFF.

Not sure where this is defined in the in the specification. Let me take a closer look at the specification and get back to you.

Best regards,
Joakim

[Marciano-PL]

Mesh Profile v1.0.1 Section 3.4.2.4 Group Adress:

A message sent to the all-nodes address[0xFFFF] shall be processed by the primary element of all nodes.

I can't speak to the Nordic Mesh SDK, but I know that this is not the case in Zephyr v2.4.0 and possibly later.