Fast integration of a custom input device

We have a custom device which is still in prototype stage, we would like to create a small demo using Unreal Engine 4. But since it’s API, specification, drivers etc… WILL change in the close future or even while we are developing the demo, so we I need to a way to fast integrate the input from the device to the UE4 engine.
I read online that you should create a plugin for UE4 that communicate with the drivers and such of the device, and eventually this is what we would do, but for this demo we need a fast and light solution so we can test and show it without a lot of studying of the UE4 engine itself.

Is there any way to achieve this? Or the only way is to write an entire plugin?

Bump. I’m very interested in the subject.