Using: UIFlow 2.1.5, AtomS3, KMeterISOunit
From the version history, it appears that the Firmware changed the KMeterISOunit API a couple revs back, but UIFlow is still generating code for the old API. When I do the blockly code and run on my AtomS3, an exception is thrown showing the issue:
Code generated (snipit)
...but from the latest API docs, the reading code should be:
Note: I did a workaround using the "Execute mpy code" block and writing in the proper API calls, but it would be nicer if the versions matched up.