I have had much success with Data Streamer when reading data that is transmitted every 1/2 to 1 second.
I am now experimenting trying to read continual data sent from an arduino nano and plotting it "real-time". Here is the issue. I have a DAC outputting a sine wave which is then read in by the nano and subsequently transmitted to Data Streamer. There is no problem reading this in and plotting the data. The issue arises if I change the DAC output to 0 or a steady voltage. It take almost 5 minutes for Data Streamer to register the change. There is nothing wrong with the data transmitting from the Arduino. It changes instantaneously. The receive data on Data Streamer doesn't change.