Page History

...

An MQTT Client folder is available for each MQTT Transmission transmitter:

where:

Name	Data Type	Description
Command Latency (ms)	Long	The amount of time for a test MQTT command message to be sent and received back by the MQTT Client
Enable Latency Check	Boolean	Writeable tag to enable command latency checking for each MQTT Client
MQTT Client ID	String	The Client ID for the MQTT Client
Offline DateTime	DateTime	The last time at which the MQTT Client successfully disconnected from the MQTT Server
Online	Boolean	A read-only tag showing the connection status of the MQTT Client
OnlineDateTime	DateTime	The last time at which the MQTT Client successfully connected to the MQTT Server
Primary Host ID	String	The Primary Host ID configured for this MQTT Client
Target Server URL	String	The URL of the target MQTT Server to connect to

Executing the code below in the Ignition Script Console will print out the values in the MQTT Client folder for review:

Code Block

language	py

clients = system.tag.browseTags(parentPath="[MQTT Transmission]Transmission Info", tagPath="*MQTT Client", recursive=True)
index = 0
printcount ("Number of MQTT Clients: " + str(len(clients)))= 0
while index < len(clients):
	    data = []
	    tagPath = str(clients[index]).split("/")
	
	    
    data.append(["Sparkplug EdgeNode Descriptor",tagPath[len(tagPath)-3],tagPath[len(tagPath)-2]])
	    data.append(["MQTT Client ID", system.tag.readBlocking(str(clients[index]) + "/MQTT Client ID")[0].value])
	    data.append(["Online", system.tag.readBlocking(str(clients[index]) + "/Online")[0].value])
	    data.append(["Online DateTime", system.tag.readBlocking(str(clients[index]) + "/Online DateTime")[0].value])
	    data.append(["Primary Host ID", system.tag.readBlocking(str(clients[index]) + "/Primary Host ID")[0].value])
	    data.append(["Target Server URL", system.tag.readBlocking(str(clients[index]) + "/Target Server URL")[0].value])
	    data.append(["Offline DateTime", system.tag.readBlocking(str(clients[index]) + "/Offline DateTime")[0].value])

    if system.tag.readBlocking(str(clients[index]) + "/Online")[0].value:
		count = count + 1				
	     
    print data
	    index = index + 1
    
print ("Number of MQTT Clients: " + str(len(clients)))
print ("Number of connected MQTT Clients: " + str(count))

Example results Example result from the Transmission > Info > Transmitters above

Code Block

language	py

>>> 
[['Sparkplug EdgeNode Descriptor', 'G1', 'E1'], ['MQTT Client ID', u'MT-a9502db1-a649-40e6'], ['Online', True], ['Online DateTime', Tue Sep 26 08:58:05 CDT 2023], ['Primary Host ID', u'IamHost'], ['Target Server URL', u'tcp://localhost:1883'], ['Offline DateTime', Tue Sep 26 08:56:44 CDT 2023]]
[['Sparkplug EdgeNode Descriptor', 'MyGroup', 'MyEdgeNode'], ['MQTT Client ID', u'MT-1d624cea-c810-40e0'], ['Online', True], ['Online DateTime', Tue Sep 26 08:58:04 CDT 2023], ['Primary Host ID', u'IamHost'], ['Target Server URL', u'tcp://localhost:1883'], ['Offline DateTime', Tue Sep 26 08:56:44 CDT 2023]]
Number of MQTT Clients: 2
Number of connected MQTT Clients: 2
>>>

Code Block

language	py

>>> 
[['Sparkplug EdgeNode Descriptor', 'G1', 'E1'], ['MQTT Client ID', u'MT-233770eca9502db1-fa46a649-46f240e6'], ['Online', TrueFalse], ['Online DateTime', FriTue Sep 2226 1108:5658:1705 CDT 2023], ['Primary Host ID', u'IamHost'], ['Target Server URL', u'tcp://localhost:1883'], ['Offline DateTime', None Tue Sep 26 08:58:53 CDT 2023]]
[['Sparkplug EdgeNode Descriptor', 'MyGroup', 'MyEdgeNode'], ['MQTT Client ID', u'MT-c53831be1d624cea-ce8dc810-43f440e0'], ['Online', TrueFalse], ['Online DateTime', FriTue Sep 2226 1108:5658:1704 CDT 2023], ['Primary Host ID', u'IamHost'], ['Target Server URL', u'tcp://localhost:1883'], ['Offline DateTime', None]]
 Tue Sep 26 08:58:53 CDT 2023]]
Number of MQTT Clients: 2
Number of connected MQTT Clients: 0
>>>

Excerpt Include

	CLD80:FAQ: Ignition Modules
	CLD80:FAQ: Ignition Modules
nopanel	true

...

Contents

Cirrus Link Resources

Inductive Resources

Versions Compared

Old Version 2

New Version Current

Key