Olympus E-M5 MarkIII, PTP Device Prop Not Supported

[brettowe]

Describe the bug
while trying to capture an image via gphoto2 command line I get a PTP Device Prop Not Supported error

Name the camera
Olympus OM-D E-M5 MarkIII
auto-detect shows
Olympus E-M5 usb:001,008

libgphoto2 and gphoto2 version
output of: gphoto2 --version
gphoto2 2.5.27 gcc, popt(m), exif, cdk, aa, jpeg, readline
libgphoto2 2.5.27 standard camlibs, gcc, ltdl, EXIF
libgphoto2_port 0.12.0 iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, ltdl, EXIF, USB, serial without locking

this is being tested via a pi400, I do have an amd64 system I can experiment with also for testing if needed.

attached is output of --config and --debug from trying --capture-image

em5m3-config.txt
em5m3-debuglog.txt

[msmeissn]

when i compare the USB Modes of the M5 Mark 2 and Mark 3 ... there is a non-MTP computer connect in the mark 2, but not the mark 3... they might have removed the remote control abilities.

[brettowe]

looking at the manual i only see mention of the app for remote control.
does gphoto do network based remote control?
https://cs.olympus-imaging.jp/en/support/imsg/digicamera/download/manual/omd/man_em5m3_e.pdf

[msmeissn]

We impelemented PTP/IP if the camera supports that ...

For Lumix we support the Lumix specific http interface.

I am not sure the Olympus talks PTP/IP, its probably yet another HTTP based protocol.

I find with Google some file download over wifi things,
https://www.dpreview.com/forums/thread/4272680
https://github.com/mauriciojost/olympus-photosync

here is a page with remote control on other olympus models:
https://rebs.biz/cc/en/index.html