I made this demo as a test using the Arduino Uno. The values are being taken from an array of ints but can be reworked to use an analog or digital input.
This display has been compiled using V0.37 of the Nextion Editor.
I have included the HMI and INO files as well.
Gene - Good Job.
Would you mind posting this under the Nextion Gallery. A Good working example is EXACTLY what the Gallery should be used for. Nextion Gallery
I am new to this board and I didn't know where to post this exactly so I just posted it here. I just re-posted it in the Nextion Gallery as you suggested.