D810 with Gphoto2 - problems

[L M]

Hello,

Please help.

I'm working on a project where I can trigger my Nikon D810 DSLR with a motion sensor. But first I would like trigger the D810 with Gphoto2.

I have been following an online tutorial and have installed the latest version of Gphoto2. However, when I try to detect or trigger the camera I am running in to issues. When I detect I get:

pi@raspberrypi:~ $ gphoto2 --auto-detect
Model Port 
----------------------------------------------------------
USB PTP Class Camera usb:001,006 

I would expect the bold area to list the D810. Then when I try to trigger the camera I get the following error:

pi@raspberrypi:~ $ gphoto2 --trigger-capture

*** Error *** 
An error occurred in the io-library ('Could not claim the USB device'): Could not claim interface 0 (Device or resource busy). Make sure no other program (gvfs-gphoto2-volume-monitor) or kernel module (such as sdc2xx, stv680, spca50x) is using the device and you have read/write access to the device.
ERROR: Could not trigger capture.
*** Error (-53: 'Could not claim the USB device') *** 

For debugging messages, please use the --debug option.
Debugging messages may help finding a solution to your problem.
If you intend to send any error or debug messages to the gphoto
developer mailing list <[hidden email]>, please run
gphoto2 as follows:

env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --trigger-capture

Please make sure there is sufficient quoting around the arguments.

The Debugger is as follows

pi@raspberrypi:~ $ gphoto2 --debug

0.000395 main(2): ALWAYS INCLUDE THE FOLLOWING LINES WHEN SENDING DEBUG MESSAGES TO THE MAILING LIST:

0.000557 main(2): gphoto2 2.5.4

0.000619 main(2): gphoto2 has been compiled with the following options:

0.000646 main(2):  + gcc (C compiler used)

0.000667 main(2):  + popt (mandatory, for handling command-line parameters)

0.000690 main(2):  + exif (for displaying EXIF information)

0.000711 main(2):  + cdk (for accessing configuration options)

0.000732 main(2):  + aa (for displaying live previews)

0.000755 main(2):  + jpeg (for displaying live previews in JPEG format)

0.000777 main(2):  + readline (for easy navigation in the shell)

0.000805 main(2): libgphoto2 2.5.4

0.000838 main(2): libgphoto2 has been compiled with the following options:

0.000862 main(2):  + all camlibs

0.000882 main(2):  + gcc (C compiler used)

0.000903 main(2):  + ltdl (for portable loading of camlibs)

0.000923 main(2):  + EXIF (for special handling of EXIF files)

0.000951 main(2): libgphoto2_port 0.10.0

0.000985 main(2): libgphoto2_port has been compiled with the following options:

0.001009 main(2):  + gcc (C compiler used)

0.001029 main(2):  + ltdl (for portable loading of camlibs)

0.001050 main(2):  + USB (libusb1, for USB cameras)

0.001071 main(2):  + serial (for serial cameras)

0.001093 main(2):  + no resmgr (serial port access and locking)

0.001114 main(2):  + no ttylock (serial port locking)

0.001134 main(2):  + no lockdev (serial port locking)

0.001157 main(2): CAMLIBS env var not set, using compile-time default instead

0.001180 main(2): IOLIBS env var not set, using compile-time default instead

0.001202 main(2): invoked with following arguments:

0.001222 main(2):   --debug

0.001302 setting/gphoto2-setting.c(2): Creating $HOME/.gphoto

0.001589 setting/gphoto2-setting.c(2): Loading settings from file "/home/pi/.gphoto/settings"

0.002234 gp-camera(2): Freeing camera...

0.002291 gphoto2-port(2): Freeing port...

0.002336 gphoto2-filesystem(2): resetting filesystem

0.002359 libgphoto2/gphoto2-filesys.c(2): Clearing fscache LRU list...

0.002383 libgphoto2/gphoto2-filesys.c(2): fscache LRU list already empty

0.002408 gphoto2-filesystem(2): Internally deleting all folders from '/'...

0.002434 gphoto2-filesystem(2): Lookup folder '/'...

0.002457 gphoto2-filesystem(2): Found! / is 0xf97b18

0.002479 gphoto2-filesystem(2): Recurse delete folder 0xf97b18//

Can you help?

Thanks,

Lyle

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[Marcus Meissner-4]

On Tue, Feb 28, 2017 at 06:29:57PM +0000, L M wrote:

> Hello,
>
> Please help.
>
> I'm working on a project where I can trigger my Nikon D810 DSLR with a motion sensor. But first I would like trigger the D810 with Gphoto2.
>
> I have been following an online tutorial and have installed the latest version of Gphoto2. However, when I try to detect or trigger the camera I am running in to issues. When I detect I get:
>
> pi@raspberrypi:~ $ gphoto2 --auto-detect
> Model Port
> ----------------------------------------------------------
> USB PTP Class Camera usb:001,006
>
> I would expect the bold area to list the D810. Then when I try to trigger the camera I get the following error:
>
> pi@raspberrypi:~ $ gphoto2 --trigger-capture
>
> *** Error ***
> An error occurred in the io-library ('Could not claim the USB device'): Could not claim interface 0 (Device or resource busy). Make sure no other program (gvfs-gphoto2-volume-monitor) or kernel module (such as sdc2xx, stv680, spca50x) is using the device and you have read/write access to the device.
> ERROR: Could not trigger capture.
> *** Error (-53: 'Could not claim the USB device') ***

It is the GVFS GNOME virtual filesystem that blocks access your camera, like the
message says.

Try e.g.:
killall gvfs-gphoto2-volume-monitor

and then replugin the camera and see if that helps.

Ciao, Marcus

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