Hi there,
Many thanks for your efforts. I was able to boot your image with my MK808b plus device. I am planning to use it on my 3D printer for Octoprint/Klipper service.
However, I'm facing the same issue that I couldn't fix it on previous balbes150 images: onboard wifi device (AP6210) doesn't work.
I tried modprobe b43 and b43legacy didn't work out.
I used meson8b-ec100.dtb as dtb.img
For more information, I can use wifi on a prehistoric (ubuntu-mate-15-04-s805-standard-0_95_Beta.img.xz) image made by anonymous. but that built is way to old and I was not able to upgrade it to bionic to install uptodate python3.
Anyway, I hope someone could help me on that.
BR
erduk