Hello Silvio, although I know that you don't want any mod harbour posts here, I would like to show you a screenshot.
I am currently switching my order system to mod harbour and have placed 400 switches on the screen as a test.
It works wonderfully. I think that would also be something for your beach software.
You can turn the mod harbour web page into an APP and everything will run like a desktop application.
Sincerely
Otto