Data source discovery

The adapter is able to discover available BACnet devices and objects defined by the data source configuration. For discovery of a BACnet router, the adapter sends a Who-Is request and waits 30 seconds to receive I-Am responses from available devices. Upon receiving an I-Am response, the adapter requests the Protocol Services Supported, Maximum APDU Length, Segmentation and Object List properties from the available devices. For discovery of a single device, the adapter does not send a Who-Is request but proceeds to request its properties.

When the adapter starts or a new data source is configured, the adapter checks if device configuration is populated. Discovery is performed only if device configuration is empty. The data selection configuration is updated by discovery only if it is empty.

A successful discovery populates the device configuration and provides information such as segmentation and services that are supported. Optionally, the data selection configuration is also populated with the Selected parameter for all items set to false. For information about device configuration and data selection configuration, see Configure data selection.

The adapter Logging indicates when discovery is complete.

Example log

[15:17:49 INF] [Bacnet] Discovering BACnet router.

[15:18:19 INF] [Bacnet] Found 2 BACnet devices during discovery.

[15:18:19 INF] [Bacnet] Discovering BACnet device 1.

[15:18:21 INF] [Bacnet] Discovery complete for BACnet device 1.

[15:18:21 INF] [Bacnet] Discovering BACnet device 33.

[15:18:53 INF] [Bacnet] Discovery complete for BACnet router.