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To improve the scalability of the platform, unneeded device state publishes for a device can be turned off. All of the following setting are optional and will override the value set in the main platform driver configuration.

publish_depth_first_all - Enable “depth first” publish of all points to a single topic.

publish_breadth_first_all - Enable “breadth first” publish of all points to a single topic.

publish_depth_first - Enable “depth first” device state publishes for each point on the device.

publish_breadth_first - Enable “breadth first” device state publishes for each point on the device.

By default, the publish_breadth_first_all, publish_depth_first, and publish_breadth_first are set to to False unless they are specifically needed by an agent running on the platform.

Note

All Historian Agents require publish_depth_first_all to be set to True in order to capture data.

By default, the value of each point on a device is published 4 different ways when the device state is published. Consider the following settings in a driver configuration stored under the name devices/pnnl/isb1/vav1:

{
    "driver_config": {"device_address": "10.1.1.5",
                      "device_id": 500},

    "driver_type": "bacnet",
    "registry_config":"config://registry_configs/vav.csv",
}

In the vav.csv file, a point has the name temperature. For these examples the current value of the point on the device happens to be 75.2 and the meta data is

{"units": "F"}

When the driver publishes the device state the following two things will be published for this point:

A “depth first” publish to the topic devices/pnnl/isb1/vav1/temperature with the following message:
[75.2, {"units": "F"}]
A “breadth first” publish to the topic devices/temperature/vav1/isb1/pnnl with the following message:
[75.2, {"units": "F"}]
These publishes can be turned off by setting publish_depth_first and publish_breadth_first to false respectively.

Also these two publishes happen once for all points:

A “depth first” publish to the topic devices/pnnl/isb1/vav1/all with the following message:
[{"temperature": 75.2, ...}, {"temperature":{"units": "F"}, ...}]
A “breadth first” publish to the topic devices/all/vav1/isb1/pnnl with the following message:
[{"temperature": 75.2, ...}, {"temperature":{"units": "F"}, ...}]
These publishes can be turned off by setting publish_depth_first_all and publish_breadth_first_all to false respectively.