There are more than one way to create a Generic REST NED.
I will demonstrate one approach where a working and existing GENERIC REST NED is adapted to a new device.
Here is a link to a video demonstration:
https://youtu.be/oRb9Www5WJk
Here is an article describing the overall procedure:
Here is a technical reference that describe the details:
And here is the repository containing the demo NED:
TBA
For comparison between before and after step two, test-device-ned can be found here:
TBA