Re: [Bacnet-developers] DNET and gateway

[Dave L. <da...@po...>]

Generally the BBMD you want to talk to is on some other subnet.   To be compatible with a BBMD you have to register with it at intervals (the registration expires) so that you can get broadcasts from the other subnet.    Also in addition to broadcasting on your own network, you have to send your broadcasts directly to the BBMD in point to point fashion so that they can be received on the other network.   For example the IAM messages.

There is specific protocol related to this, but the bacnet stack has helpers and so forth.    There might be an example as well.    I found it pretty easy not only to interact with BBMDs but to create one for testing!

David
From: Derek Noffke <de...@pu...>
Sent: Thursday, May 13, 2021 8:59 AM
To: bac...@li...
Subject: [Bacnet-developers] DNET and gateway

Greetings,

I have an app based on the gateway demo code.  BACnet Stack Version 0.8.4
I have been informed that my gateway is not compatible with a BBMD.

The startup I-AM sequence is attached.
I see that the I-AM for my "root" device 2700000 does NOT contain the DNET.
Is this possibly the problem?

Regards,

Derek Noffke
PurpleSwift
Cell: 082 780 4680
Tel: 021 761 8264