Maybe that’s the problem ! The library that I’ve used in Arduino IDE is SmartMatrix-teensylc.
The problem with Platformio IDE is that I’ve referenced the link to the library https://github.com/pixelmatix/SmartMatrix.git which is the same for all the branches and probably it links the master branch.
But it’s beside the point.
My main problem is that I have no idea how to use this library with my display.
@marcmerlin, @Louis
Please take a look at this post. This is what’s actually important ! I’ve posted a video and a lot of details of what my issues are.
I would really love an answer there.
Please ! Thank you !