SerialReadLine output for rolling graph

[yqwang1]

Hi all,

I am using SerialReadLine node reading Arduino serial data and save it to csv, I am wondering if I can visualize the data from SerialReadLine into a graph that I can track in realtime, the data are three numbers (in char form) changing by time.

Another minor question is that I found if I use CreateSerialPort--SerialReadLine--CSVWriter, then there is only one output from Arduino, just curious if anyone encounter the same situation.

Many thanks if anyone has some experience!

[banchan86]

Just to clarify, are the 3 numbers on the same line (for e.g. 2 6 5)?

• If it's just a single number, you can use the ExpressionTransform operator to convert the String to an Int32 or Double and then that should be viewable as a graph.

• If you need to split the String you can use the Parse operator to parse the String into separate numbers. You can use something like %i %i %i for the pattern (if your number is an integer, if not use %f). If you do that you don't need to do the type conversion. The graph for Parse will have all 3 numbers overlaid, or you can split the output to view individual numbers.

The SerialReadLine output should be a single output (just a string), so it should be related to what I have mentioned above. If not, can you provide more details?

[yqwang1]

Thank you so much for your quick response @banchan86 !!!!
parse is really useful!!!
sorry, I forgot to mention, that the output format is sth like (23333,0,1), with commas between numbers.
I found it difficult to find the right patterns for it, warning for pattern like %i%c%f%c%f (though every single pattern works for each single output.)
Appreciated very much if any further insight!