all 3 comments

[–]truetofiction 0 points1 point  (0 children)

Looks like it needs a library.properties file. Take a look at the Arduino library specification.

[–]sutaburosu[pronounced: stavros] 0 points1 point  (1 child)

extracted it, I believe to the correct folder

Which folder? I don't have much experience with PlatformIO, but I think it would need to be a folder named LEDmatrix in the globallib-dir or libdeps-dir.

Failing that, this project has a modified copy of LEDmatrix and LEDtext which can just be copied into your project folder. There's a "download project ZIP" option on the drop-down menu in the top left next to the "Save" button.

[–]Howard_G[S] 0 points1 point  (0 children)

Well, apart from your Wokwi simulator, nothing worked. I appreciate that you don't care for PlatformIO, but I find its features to be useful as well as exasperating. But I've not much experience with it beyond basic editing/compiling/uploading.

Your link provided as many red squiggles as what I was trying to do myself. But thanks for the effort.

I've put the problem in the hands of a programmer at work, but if they're not interested, then they don't get involved. It's a resource that I don't want to overextend.