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

Code Block
languagepy
print ("Number of Connected Clients: " + str(system.tag.readBlocking("[MQTT Distributor]Distributor Info/Connected Clients")[0].value))
print ("Keep Inactive Clients: " + str(system.tag.readBlocking("[MQTT Distributor]Distributor Info/Keep Inactive Clients")[0].value))
print ("Total clients that have connected since last MQTT Distributor restart: " + str(system.tag.readBlocking("[MQTT Distributor]Distributor Info/Total Clients")[0].value))

clients = system.dataset.toPyDataSet(system.tag.readBlocking("[MQTT Distributor]Distributor Info/MQTT Clients")[0].value)      
print ("MQTT Client details:")
for row in clients:
	data = []
	data.append(["Client  clientId = ID", row[0]])
    userName = 	data.append(["Username", row["Username"]])
	data.append(["IP    ipAddress = Address", row["IP Address"]])
    connected = 	data.append(["Connected", row["Connected"]])
	data.append(["Last Connect   lastConnectTime = Time", row["Last Connect Time"]])
	data.append(["Last Disconnect   lastDisconnectTime = Time", row["Last Disconnect Time"]])
    print clientId, userName, ipAddress, connected, lastConnectTime, lastDisconnectTime

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	print data


Example result from the Distributor Info > MQTT

...

Clients 

Image Added

py
Code Block
language
>>>
MT-9bfd05ba-ddbb-4263 admin 127.0.0.1 False Fri Sep 22 10:54:23 CDT 2023 Fri Sep 22 10:54:39 CDT 2023
ME-d631ab45-4466-42f0 admin 127.0.0.1 True Fri Sep 22 09:45:03 CDT 2023 None
MT-1693f8e5-014a-4609 admin  
Number of Connected Clients: 4
Keep Inactive Clients: True
Total clients that have connected since last MQTT Distributor restart: 6
MQTT Client details:
[['Client ID', u'MT-abf45d02-4c23-4489'], ['Username', u'admin'], ['IP Address', u'127.0.0.1'], ['Connected', False], Fri['Last Sep 22 10:04:20 CDT 2023 Connect Time', Fri Sep 22 1016:5101:0243 CDT 2023
MT-34fb9f47-e865-4ff6 admin 127.0.0.1 False], ['Last Disconnect Time', Fri Sep 22 1016:5404:0032 CDT 2023 Fri Sep 22 10:54:22 CDT 2023
MT-5d6c76ef-9ba3-4253 admin ]]
[['Client ID', u'ME-d631ab45-4466-42f0'], ['Username', u'admin'], ['IP Address', u'127.0.0.1'], ['Connected', True], Fri['Last Sep 22 10:55:16 CDT 2023 None
MT-99a2160a-2024-4efc admin 127.0.0.1 False Connect Time', Fri Sep 22 1016:5201:3142 CDT 2023], Fri['Last SepDisconnect 22 10:52:46 CDT 2023
MT-0f0f996c-3485-4a13 admin Time', None]]
[['Client ID', u'MT-6697e6f5-35fe-471f'], ['Username', u'admin'], ['IP Address', u'127.0.0.1 False Fri Sep 22 10:54:23 CDT 2023 '], ['Connected', True], ['Last Connect Time', Fri Sep 22 1016:5404:3934 CDT 2023
MT-164d6bdb-73ad-4bd5 admin 127.0.0.1 True Fri Sep 22 10:55:16 CDT 2023 None
MT-8f7c9989-71c1-44a3 admin ], ['Last Disconnect Time', None]]
[['Client ID', u'MT-12c7ca46-e2ec-416c'], ['Username', u'admin'], ['IP Address', u'127.0.0.1'], ['Connected', False], Fri['Last Sep 22 10:54:40 CDT 2023Connect Time', Fri Sep 22 1016:5501:1443 CDT 2023
MT-6e965a20-0618-4a4b admin 127.0.0.1 False], ['Last Disconnect Time', Fri Sep 22 1016:5404:0032 CDT 2023 Fri Sep 22 10:54:22 CDT 2023
MT-f84dea1d-4679-49ae admin ]]
[['Client ID', u'MT-04edd7b9-b7ad-455d'], ['Username', u'admin'], ['IP Address', u'127.0.0.1 False Fri Sep 22 10:54:40 CDT 2023 '], ['Connected', True], ['Last Connect Time', Fri Sep 22 1016:5504:1434 CDT 2023
MT-acea8aa2-8ef0-4c23 admin 127.0.0.1 False Fri Sep 22 10:53:54 CDT 2023 Fri Sep 22 10:53:58 CDT 2023
], ['Last Disconnect Time', None]]
[['Client ID', u'MT-RPC-73ecfe46-2a63-41'], ['Username', u'admin'], ['IP Address', u'127.0.0.1'], ['Connected', True], ['Last Connect Time', Fri Sep 22 1016:5504:1532 CDT 2023 None
MT-99472916-0177-4d89 admin 127.0.0.1 False ], ['Last Disconnect Time', Fri Sep 22 1016:5204:4732 CDT 2023 Fri Sep 22 10:53:58 CDT 2023
>>>]]
>>>

Additional Information on MQTT Engine and Transmission Clients

MQTT Engine Clients

MQTT Engine has two potential client connections per MQTT Server setting.

One, with ClientId in the format ME-xxxxxxx-xxxx-xxxx, will publish the v3.0.0 Sparkplug™ B STATE message which will be initiated by default.

A second optional client, with ClientId in the format ME-LS-xxxxxxxx-xxxx-xx, is available to publish the legacy Sparkplug™ B STATE message and is disabled by default.

Tip
See How do I know how many MQTT Clients are connected from MQTT Engine for additional information


MQTT Transmission Clients

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In addition, MQTT Transmission supports an optional RPC Client, ClientId MT-RPC-xxxxxxxx-xxxx-xxxx, which is used when publishing from Ignition Python scripts. This is enabled by default.

Tip
See How do I know how many MQTT clients are connected from MQTT Transmission for additional information



Excerpt Include
CLD80:FAQ: Ignition ModulesCLD80:
FAQ: Ignition Modules
nopaneltrue

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