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Cirrus Link Resources
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Cirrus Link Modules Docs for Ignition 7.9.x
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This can also be true with certain Sparkplug based payloads where metric names may have unusual characters in them. While MQTT and Sparkplug both support characters such as . & % =, Ignition does not support these as valid characters in a tag path or tag name. As a result, sometimes it may be necessary to tell MQTT Engine to replace certain characters or strings of characters with something else so the tag path and tag names can be properly created in Ignition. |
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The String Conversion feature can be used in any Custom Namespace or in the Sparkplug B Namespace. The String Replacement feature supports the following.
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When an Ignition tag is created, there are some rules than that need to be followed:
'
, -
, :
, (
, )
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To determine the string replacement needed for the namespace:
Consider an incoming MQTT message with the characteristics:
Consider Now consider an incoming MQTT message with the characteristics:
This A custom namespace with a subscription a/# will be able to receive the message however this will fail to be handled by the Custom Namespace and an error will be logged that looks like:
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