Hi,
I changed how I work with the little backup box, perhaps it could be an additional option.
I chose to use camera-backup.sh option on boot, but commented out the shutdown on line 27. So now if I power-on the RaspberryPi it waits for the camera to be attached.
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If the camera is attached it performs the backup of the photos on the camera and then does a shutdown
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if the camera is not attached it stays in the loop checking for a camera and I can use a DLNA client to view my photos for a long as I need to.
The problem is then the shutdown, I just unplug it. Perhaps an idea could be to check if there are no tcp connections for a few minutes, then it could shutdown.
Regards,
Robert