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Details about the Sparkplug EdgeNodes connected at Engine can be found in the Engine Info > Edge Nodes folder in the MQTT Engine tag provider.
where:
Name | Data Type | Description |
---|---|---|
Last Node to Connect | String | The Sparkplug ID of the last node to connect |
Last Node To Disconnect | String | The Sparkplug ID of the last node to disconnect |
NodesOffline | Integer | The number of Sparkplug Edge Nodes offline. This is determined by whether the last lifecycle message was an NBIRTH or NDEATH |
NodesOnline | Integer | The number of Sparkplug Edge Nodes online. This is determined by whether the last lifecycle message was an NBIRTH or NDEATH |
NodeUnitCount | Integer | The total number of Sparkplug Edge Nodes as determined by the received NBIRTH messages |
Offline Nodes | Dataset | A dataset containing the Sparkplug ID and timestamp for all offline Sparkplug edge nodes |
Online Nodes | Dataset | A dataset containing the Sparkplug ID and timestamp for all online Sparkplug edge nodes |
Executing the code below in the Ignition Script Console will print out the values in the Offline Nodes and Online Nodes datasets for review:
onlineEdgeNodes = system.dataset.toPyDataSet(system.tag.readBlocking("[MQTT Engine]Engine Info/Edge Nodes/Online Nodes")[0].value) print "Online Sparkplug EdgeNodes: " + str(system.tag.readBlocking("[MQTT Engine]Engine Info/Edge Nodes/NodesOnline")[0].value) if system.tag.readBlocking("[MQTT Engine]Engine Info/Edge Nodes/NodesOnline")[0].value > 0: for row in onlineEdgeNodes: data = [] data.append(["Sparkplug EdgeNode Descriptor", row[0]]) data.append(["Last Connect Date", row["Date"]]) print data offlineEdgeNodes = system.dataset.toPyDataSet(system.tag.readBlocking("[MQTT Engine]Engine Info/Edge Nodes/Offline Nodes")[0].value) print "Offline Sparkplug EdgeNodes: " + str(system.tag.readBlocking("[MQTT Engine]Engine Info/Edge Nodes/NodesOffline")[0].value) if system.tag.readBlocking("[MQTT Engine]Engine Info/Edge Nodes/NodesOffline")[0].value > 0: for row in offlineEdgeNodes: data = [] data.append(["Sparkplug EdgeNode Descriptor", row[0]]) data.append(["Last Connect Date", row["Date"]]) print data
Example result from the Engine Info > Edge Nodes above
>>> Online Sparkplug EdgeNodes: 2 [['Sparkplug EdgeNode Descriptor', u'MyGroup/MyEdgeNode'], ['Last Connect Date', Fri Sep 22 14:04:40 CDT 2023]] [['Sparkplug EdgeNode Descriptor', u'G1/E1'], ['Last Connect Date', Fri Sep 22 14:04:40 CDT 2023]] Offline Sparkplug EdgeNodes: 0 >>>