I’m aware of one person who’s used the HereLink V1.1 Air Unit ethernet port - but no details on connectivity configuration were offered.
There’s a growing number of camera and gimbal/cameras that use IP connectivity. My guess is that while ethernet is a low level in the protocol stack, MavLink is still used at the high level.
But ArduPilot still requires parameters on where the gimbal and camera is addressed
How is this done with the new ethernet/IP connectivity on devices such as the HereLink V1.1 air unit. (SIYI air units offer the same type of ethernet connections)
AP doesn’t support Ethernet yet but it is being actively worked on and should arrive in version 4.5.0. We’re at 4.3.4 now so that may seem like a long way off but 4.4 should start beta testing within a couple of weeks so 4.5.0 should start beta testing before the end of the year.
Without AP having ethernet support, I think control of gimbal needs to be done using one of the existing methods (serial or PWM) but perhaps the video stream from the camera to the ground station could be done over ethernet because that doesn’t go through AP.
Most IP cameras-gimbals out there (e.g. security cameras) will only allow support for controlling the gimbal via ethernet which isn’t going to work for now. The Siyi ZR10 is an example of a camera/gimbal that can be controlled using serial but still send the video using ethernet.
