I am currently rebuilding kernel packages which should fix onboard Ethernet. Probably some other changes enhance WiFi stability as well: Armbian · MichaIng/DietPi@4f0cc5c · GitHub
Once this workflow has finished, test them with:
cd /tmp
wget https://dietpi.com/downloads/binaries/testing/linux-{image,dtb}-current-sunxi64.deb
dpkg -i linux-{image,dtb}-current-sunxi64.deb
reboot
One thing about WiFi: It does not seem to be possible to unload and re-load the kernel module. This means, on first boot, if WiFi was not enabled via dietpi.txt, it is not possible to use it, without another reboot. If someone finds time to see whether this can be verified and replicated this way, that would be helpful:
ip l
modprobe -r sprdwl_ng
sleep 2
modprobe sprdwl_ng
sleep 5
ip l
We can then leave it enabled on first boot, and show a prompt about required reboot, when enabling it.
EDIT: I pushed the kernel to our APT server already, hence you can upgrade it now via:
apt update
apt upgrade