[guide] DSLR snapshots - gphoto2 triggered

[ihrapsa]

Use gphoto2 to trigger a DSLR shutter. With this software you can also transfer pictures to the Linux controlling device as well. Luckily this package is available inside OpenWrt repo:
opkg update && opkg install gphoto2 libgphoto2-drivers-ptp2

Note!
There are a lot of other drivers so if with this one your cammera is not detected when you run gphoto2 --auto-detect you might have to try others. Look in here for libgphoto2-drivers-* packages to find a possible driver name.

Connection:

     📷 <----- USB cable -----> 📥
(DSLR camera)             (OpenWrt box)

Useful comands

gphoto2 --trigger-capture
gphoto2 --list-files
gphoto2 --get-config capturetarget
gphoto2 --set-config capturetarget=1 to change save location to SD card instead of camera RAM

Executing shell commands in klipper

Unofficial extension here by Arksine
Needs to be copied to klipper/klippy/extras
Configurations here

Macro tamplate
❗ Make sure the Capture Target is set to Memory card. Use gphoto2 --get-config capturetarget to check that and gphoto2 --set-config capturetarget=1 to change it

[gcode_shell_command gphoto_trigger]
command: gphoto2 --trigger-capture
timeout: 2.
verbose: False
[gcode_macro GPHOTO_TAKE_FRAME]
gcode:
    RUN_SHELL_COMMAND CMD=gphoto_trigger

Use GPHOTO_TAKE_FRAME in slicer after layer change

You can also create another macro (named for ex: GPHOTO_TAKE_PARKED_FRAME) that parks the head and calls the above GPHOTO_TAKE_FRAME macro. This will create nicer timelapses with the head out of the way. Don't forget to use GPHOTO_TAKE_PARKED_FRAME inside slicer Z layer change instead.

video tutorial:
https://www.youtube.com/watch?v=1eAYxnSU2aw

Maybe useful for my D3300:
https://github.com/gphoto/libgphoto2/blob/master/camlibs/ptp2/cameras/nikon-d3300.txt

[wbatty]

Stumbled across this while doing a google search for how to get DSLRs working with klipper, I had totally forgotten about the shell command extension.. Anyway I made a macro that implements parking the toolhead, maybe someone will find it useful:

[gcode_shell_command gphoto2_trigger_snapshot]
command: gphoto2 --auto-detect --trigger-capture
timeout: 10. ; make sure this is long enough to account for focus time
verbose: False

[gcode_macro TAKE_SNAPSHOT]
description: Saves current location, moves toolhead to rear of bed, and takes a snapshot before returning.
gcode:
  {% set delayMS = 2000 %} ; Delay after moving and before taking the snapshot, deals with buffering so we don't get the print head in motion
  {% set snapshotPositionX = printer.toolhead.axis_maximum.x / 2 %} ; Middle of bed
  {% set snapshotPositionY = printer.toolhead.axis_maximum.y - 5 %} ; rear of bed w/ some buffer
  {% set currentX = printer.gcode_move.gcode_position.x %}
  {% set currentY = printer.gcode_move.gcode_position.y %}
  {% set currentZ = printer.gcode_move.gcode_position.z %} ; could be used for z-hop which we are not doing in this macro, so it's best to run this in AFTER_LAYER_CHANGE
  SAVE_GCODE_STATE NAME=take_snapshot_state

  {% if printer.extruder.can_extrude|lower == 'true' %}
    G10 ; retract
  {% endif %}

  G90

  G0 X{snapshotPositionX} Y{snapshotPositionY} F5000.0 ;Move to snapshot position

  G4 P{delayMS} ; Dwell for delayMS seconds

  RUN_SHELL_COMMAND CMD=gphoto2_trigger_snapshot

  G0 X{currentX} Y{currentY} F5000.0 ;Return to original position

  {% if printer.extruder.can_extrude|lower == 'true' %}
    G11 ; unretract
  {% endif %}

  RESTORE_GCODE_STATE NAME=take_snapshot_state

[ihrapsa]

Woa this is awesome, thanks for sharing! ☺

[Twentse3d]

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 gphoto-devel@lists.sourceforge.net, please run
gphoto2 as follows:

env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt as follows:

Please make sure there is sufficient quoting around the arguments.

pi@speeder-pad:$
pi@speeder-pad:$ env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --get-config capturetarget

*** Error ***
An error occurred in the io-library ('I/O problem'): No error description available

*** Error ***
An error occurred in the io-library ('I/O problem'): No error description available
*** Error (-7: 'I/O problem') ***

?????? whats problem ?

[ihrapsa]

Please explain your issue properly first.

[Twentse3d]

whats problem ???

pi@speeder-pad:~$ gphoto2 --auto-detect
Model Port

Canon EOS M50 usb:001,006
pi@speeder-pad:~$ gphoto2 --get-config capturetarget

*** Error ***
An error occurred in the io-library ('I/O problem'): No error description available

*** Error ***
An error occurred in the io-library ('I/O problem'): No error description available
*** Error (-7: 'I/O problem') ***

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 gphoto-devel@lists.sourceforge.net, please run
gphoto2 as follows:

env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --get-config capturetarget

Please make sure there is sufficient quoting around the arguments.

pi@speeder-pad:~$ gphoto2 --set-config capturetarget=1

*** Error ***
An error occurred in the io-library ('I/O problem'): No error description available

*** Error ***
An error occurred in the io-library ('I/O problem'): No error description available
*** Error (-7: 'I/O problem') ***

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 gphoto-devel@lists.sourceforge.net, please run
gphoto2 as follows:

env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --set-config capturetarget=1

Please make sure there is sufficient quoting around the arguments.

pi@speeder-pad:~$

[ihrapsa]

whats problem ???

Please state your issue properly. I don't know anything about your setup, what you did to try to fix it, when those errors happen and so on. And please format any logs you have properly between "```" marks or click on the Add code button.

[Xapu1337]

whats problem ???

pi@speeder-pad:~$ gphoto2 --auto-detect

Model Port
Canon EOS M50 usb:001,006 pi@speeder-pad:~$ gphoto2 --get-config capturetarget

*** Error *** An error occurred in the io-library ('I/O problem'): No error description available

*** Error *** An error occurred in the io-library ('I/O problem'): No error description available *** Error (-7: 'I/O problem') ***

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 gphoto-devel@lists.sourceforge.net, please run gphoto2 as follows:

env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --get-config capturetarget

Please make sure there is sufficient quoting around the arguments.

pi@speeder-pad:~$ gphoto2 --set-config capturetarget=1

*** Error *** An error occurred in the io-library ('I/O problem'): No error description available

*** Error *** An error occurred in the io-library ('I/O problem'): No error description available *** Error (-7: 'I/O problem') ***

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 gphoto-devel@lists.sourceforge.net, please run gphoto2 as follows:

env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --set-config capturetarget=1

Please make sure there is sufficient quoting around the arguments.

pi@speeder-pad:~$

maybe late but it is the USB port you plug it in!
if its a dock or the pi just can't provide enough power to the USB ports for it to work.