Multicast personalization on Node


#1

Hello,

We are assessing to use your Lora Server, but I would like to know how to implement Multicast messaging on my end-node (currently using Murata Module with ST LoRa libraries based on Lora Stack by StackForce ).

If I have understood well your multicast support (Device group configuration) requires personalization on the node itself, right?
How many device groups can be set for a single node?

Where can I find information about the personalization to implenent in our nodes so as to being able to support Multacast messages from your LoraServer?

Regards, Ramon.


#2

It is correct that when you setup a multicast-group, this must be personalized at the device-side.

Please refer to the LoRaWAN specification for more information about multicast. How this is implemented at the device-side is vendor specific (also if Class-B and / or Class-C multicast is supported). It is also vendor specific how many multicast-groups a device can be part of.


#3

Thanks for youur answer.

I will find out how to setup groups in my device.

On the server side. Is there any example where I can see how multicast or device groups are setup in LoraServer?
Is still needed to setup a ABP dummy node so as to perform the multicast?

Other important question. As far as I have understood in this post:


In a scenario where there are several gateways the Multicast message can not be sent by all gateways. Right?

But having a look at the changelog of LoraServer 2.1.0 says the following:
"
This adds experimental support for creating multicast-groups to which devices
can be assigned (potentially covered by multiple gateways).
"

Does this mean the server now sends the Multicast message through all/Multiple gateways linked to the server?

Regards, Ramon.


#4

It sends the downlink to the minimal set of gateways to cover all devices within the multicast-group.

See also: https://www.loraserver.io/lora-app-server/use/multicast-groups/.