Conduit(AEP Model): How to set the frequency sub-band in packet forwarding mode?

[Frank A]

Hi,

I am currently experimenting with the AEP version of MultiTech’s Conduit, and I have a question about using this model with the basic packet forwarder that comes pre-installed with it. (Note: I am using US_915MHz)

Basically, I am trying to use the Conduit in packet forwarding mode, but I would like to be able to modify the frequency sub-band. Currently, my understanding is that the frequency sub-band value defaults to 1 with the basic packet forwarder, because I performed a few tests with an external network server and the mDot, and the latter (i.e. the mDot) will only work with the network when compiled (I am using mbed os) for frequency sub-band 1. Changing the sub-band value in /var/config/lora/lora-network-server.conf on the AEP gateway does not appear to do anything when in basic packet forwarding mode.

Is there something that I am missing? I know that I could always install mLinux instead and follow the following procedure, but I think that it would be convenient to be able to modify the frequency sub-band for packet forwarding on the AEP version.

Thanks in advance! 🙂

Frank

[Frank A]

I further inspected the configuration file for the basic packet forwarder (e.g. http://www.multitech.net/developer/wp-content/uploads/2017/05/US-915-example-config.txt) and I finally figured out that the frequency sub-band was set using the fields radio0 and radio1.

The example configuration file above uses values that represent frequency sub-band 1, and since these are the exact same configurations I was using, that explains why my mDot needed to be compiled for FSB 1. So, if I want to use a different sub-band, I need to modify those values accordingly.

[Mike Fiore]

Frank,
That’s correct! There are some example configurations at the following link (I think you’ve already found them, but here it is again):

http://www.multitech.net/developer/software/lora/aep-lora-packet-forwarder/

Cheers!
-Mike

[Frank A]

Hey Mike,

Thank you for confirming this!

I did not think to ask in my original question, but now I think that it is a relevant request: I wonder if you could point me to some official documentation on how one would go about configuring the basic packet forwarder for different frequency sub-bands.

There is an example here (https://github.com/Lora-net/packet_forwarder/blob/master/lora_pkt_fwd/cfg/global_conf.json.US902.basic) from Semtech for frequency sub-band 1, and here is another one by The Things Network for frequency sub-band 2 (https://github.com/TheThingsNetwork/gateway-conf/blob/master/US-global_conf.json). Looking at these files, I realize that there is likely at lot of tuning that can be performed, for a wide array of configuration options. So it would be nice to have official guidelines about custom configurations.

Thank you for your time and support. A+

Frank

[Mike Fiore]

Frank,

We have some example packet forwarder configs at the link I posted earlier. It has some comments about potential pitfalls, etc. If you have more questions, feel free to reach out via the forum.

Cheers!
-Mike

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