Ah, yeah, our library won’t handle that directly, you’ll need to binarize the image to black and white.
That’s quite a hard code to read with our code. Our AprilTag library is much better and could 100% handle that. But, were’ just using libdmtx for datamatrix support which is not that great of the library.
I have these reading great in and H7 Plus but it is very sensitive to lighting and surprisingly seems to not like having the code perfectly square to the frame. I have used the pylibdmtx previously on the PC and not seen the angle sensitivity.