tblong/yabe ? reverse-engineered prompt

Build me a Windows app for exploring BACnet devices, kind of like a network browser for building automation gear.

I want to be able to connect over BACnet/IP first, and also support the other transports this project mentions, like MSTP and PTP through a pipe or serial style connection. The app should scan for devices, show them in a tree, let me open a device to browse its address space, inspect properties, edit writable values, and subscribe to points so I can watch changes live. It should also support basic file upload and download when a device exposes file objects.

Please include a demo server too, so I can test it without real hardware. It would be great if the demo includes a large blob or similar data so I can test segmented reads and writes. If there are any current BACnet docs or implementation details you need, look them up online and build this in a practical way with a clean Windows desktop interface.