LabVIEW
Scan From String cannot find values from a stream of strings
You're reading random sized string parts, 32 bytes each time, and then search those parts for a specific string.
That won't work, or it will work coincidently at best.
If you insist on not using a termination character (that does seem to be there), you'd have to concatenate the string to build up the complete string, and search that string instead. This will be very impractical, but it's the consequence of not using a termination character or some other means of synchronizing the string messages.
Why is there a sequence structure, that doesn't do anything except making your diagram harder to read. Pretty much like all the wire bends.
Search LabVIEW like a graph! 
Yes, you should be using the Termination Character and set the number of bytes to read to be more (I like to use 100 or even 4096 for terminals). Then you will be reading complete lines each iteration. From there, you could use Scan From String to try to parse it. Just do not update all of the indicators if you get an error.
@samAAF wrote:
Each line is terminated with "\n" or do you mean a termination character is needed in the scan from string formatting?
No. The "Enable Termination Character" Boolean input to the VISA Configure Serial Port should be set to TRUE. The Term Char should also be set to 0xA if your strings are ending with a Line Feed (\n). 0xD is a Carriage Return (\r).
@samAAF wrote:
Oh right thanks! corrected it but that doesn't change anything. I can see the function picked out the values and they appear momentarily in the bottom right text boxes in the video.
Of course you should also
+ not use Bytes at Port
+ use 0xA or 10 as end termination character (not 0xD)
+ increase the nr of bytes to read so it's always large enough
+ store the values on a successful read, the parsed values will disappear the next cycle because that string isn't the string you want. use a shift register
+ Upload the new code...
@samAAF wrote:
Thank you for the suggestion. Could you elaborate further on how to store a value from a successful read? It appears that the scan from string function will return 0 if nothing of interest is in the string rather than ignore the string completely. This seems to be where the problem is.
You can store values in shift registers. Just only update the values if you do not have an error from the Scan From String.
