Allow PI Adapter for MQTT (Generic) to process non-json payloads
Some MQTT devices do not send json payloads; for example, some devices send a single value as the payload for a specific topic.
It would be beneficial for the adapter to be able to handle this rather than to convert these payloads into json before they get to the adapter.

We would like to know more about the frequency in which our customers come across this scenario. Please share your use cases in the comments section.
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Mike Horrocks commented
In this use case the PI Adapter was proposed but devices are already in place and publishing raw data payloads to the MQTT broker so it is not feasible to change the data to JSON or Sparkplug.
Workarounds to convert the data to Sparkplug increases the effort needs, and the costs involved.