Append the following in /etc/apt/sources.list
on your Pi 4.
deb [trusted=yes] https://advantechralph.github.io/uno-220/dpkg/ /
For beta testing packages
deb [trusted=yes] https://advantechralph.github.io/uno-220/dpkg/beta/ /
Run apt-get update
$ sudo apt-get update
Install packages.
$ sudo apt-get install uno220config uno220rtc uno220gpio uno220uart
GPIO Pin Definition Packages
$ sudo apt-get install uno220gpiopins
Optional packages
$ sudo apt-get install uno220tpm uno220cputempmon
Reboot your Pi 4 and test IO.
$ sudo systemctl reboot
uno220
, raspberrypi