Re: [Bacnet-developers] DNET and gateway
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From: Derek N. <de...@pu...> - 2021-05-13 14:58:44
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Thanks Dave, I know very little about BBMD workings so any info is most welcome. J Client on site manually adds my root device 2700000 to his BBMD. Discover works 20% of the time. Client says problem is 2700000 is on DNET 0 while all other are on DNET 2809 Regards, Derek Noffke PurpleSwift Cell: 082 780 4680 Tel: 021 761 8264 From: Dave Lindauer via BACnet-developers [mailto:bac...@li...] Sent: Thursday, 13 May 2021 16:15 To: Discussion for developers of the BACnet stack Cc: Dave Lindauer Subject: Re: [Bacnet-developers] DNET and gateway 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 |