AnalogGraphMultipleInputs.ino - e-Ink port

[piecol]

Hi,

thanks for sharing your code!

I am trying to adapt the multiple inputs scrolling graph to a 2.13 e-ink display.
I had the same reported issues about "warning: passing 'const Adafruit_SSD1306' as 'this' argument discards qualifiers [-fpermissive]" and I changed the code according to your fixes - more or less.

I succeded in compiling the code and plotted the axes, but had no luck with actual values from my sensor. Plus on the status bar, beside the cirlce and square symbols I have fixe values of -4 and 12. I could not understand from where those values emerge.

Could you please help and review what I have done?
https://github.com/piecol/eink_multi_graph_scrolling

[piecol]

I report the same behavior using the oled display.