This app allows firmware upgrades of routers while keeping user installed packages. To do so the app sends a request to an Atttended SysUpgrade server which will respond with a custom image, containing all previously installed packages.
The process takes per images between 30 seconds and 5 minutes, please be patient.
More information on the backend server and how to host one are available on the projects page: https://github.com/aparcar/asu/