Modified Top Board control program for better compatibility with Raspberry Pi 4.
In particular, the CPU fan should be working now.
sudo apt update
wget https://github.com/tomgehrmann/rockpi-quad/releases/latest/download/rockpi-quad.deb
sudo apt install -y ./rockpi-quad.debImportant
Make sure that the user _apt has the necessary permissions to install the deb package, e.g. copy the package into /tmp before installing it.
The fixes are probably from Alexander Larin (@alexanderlarin), as his repository shows the earliest commits related to these issues. I just modified the build process.