Trigger Camera connected with SingleBoardComputer from the PixHawk connected with SBC

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1

I am doing a little different thing, here are the details:
1- PixHawk 4
2- Raspberry Pi 4
3- 4K Camera (Make & Model Not selected)

RPi = Raspberry Pi 4 (Single Board Computer)
PH = HolyBro PixHawk 4

I connected the RPi with PH using the Telemetry Port 2 of PH & Serial Port of RPi. Both get connected and I can operate the PH from the RPi. Everything is fine till this.
But the real problem which I had is: I want to connect a camera with my RPi so it can save the images on the Memory device connected with the RPi, but my camera will capture the images on the GPS locations which I set in the WayPoints while uploading the Mission on the PH.

I know there are AUX ports (AUX4-5 or AUX5-6) in the FMU PWM OUT, but how to use those or something like this, I am confused about the flow.
Please help me with the flow and the solution as well.

2

The simpliest way is to connect your camera trigger to PWM out directly, imho.
But youl’ll need to solder external trigger transistor to your camera - to emulate manual trigger - if it does not have the external trigger plug.
You will not need to use RPI in this case. Setup and test external trigger for your camera, like explained here: https://docs.px4.io/master/en/peripherals/camera.html