Hi,
I am already working on a Windows 10 application that comunicates via blueetooth with an external device to read/write data from/to it. So I know more or less what do you need.
I can create a WPF application ( it is a Windows desktop application) following the instructions of your doc file. The main issue I can see here with this project is related the external devices. It is quite impossible to complete the application without test have, at least one of it, in my hand for test.
Maybe I can create the GUI, as you suggest, but then we need to find a way to connect the devices to the develop machines.
Please ping me back to discuss about the details.
Regards
Armando