Using Nextion waveform with Arduino

Using Arduino Displays
1

Hello group,

I'm trying to visualize into a Nextion display WaveForm some data received from a pressure sensor.
After difference researches, studies and "bad words" :face_with_symbols_over_mouth:, I'm finally able to see something on the display, but the resolution is so tiny that appear a stain instead of a valuable curve.

Let me give you some context conditions:

  • the waveform area is 255x800 (HxW) and the %scaling is 100 (dis param)
  • the reads append every 500-550 ms and are 16 (about 9 sec)

The pressure value is sent to display in this way:

  int plotValue = map(pressureValue, 0, 100, 0, 255);
  Serial1.print("add 1,0," + plotValue);
  Serial1.write(0xff);
  Serial1.write(0xff);
  Serial1.write(0xff);

and the results on the display is in the picture

20221006_090840
20221006_0908401920×1440 142 KB

But is not possible to enlarge the scale on the x axe, so that the curve are readable ?
Or perhaps there is something missing by me!

2

Just send all x-values twice, thrice, ... to make them more readable.

3

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