How to set Shutterspeed of Ricoh Theta S via USB using gphoto or ptpcam?

Question

I want to control a ricoh theta 360 camera using a raspberry pi 3 and ubuntu mate. I got gphoto2 via apt-get and ptp build from source. I also have the latest firmware version for the theta installed. Further, the exposure program was set to 1 (Manual program) or 4 (Shutter priority program).

to set the shutterspeed manually I tried the following:

using ptpcam:

   ptpcam --set-property=0xD00F --val=\x01\x00\x00\x00\x01\x00\x00\x00

Response:

   Camera: RICOH THETA S
   'UNKNOWN' is set to: 
   Changing property value to x01x00x00x00x01x00x00x00 [(null)] FAILED!!!

using gphoto2:

   gphoto2 --set-config shutterspeed=0.1

Response:

   *** Error ***              
   The shutterspeed widget is not configurable.
   *** Error (-2: 'Bad parameters') *** 

Answer 1

I found a pretty useful script at github (github: tlapser360) from Jason Charcalla.

There, it is explained that one can send a raw generic request as follows:

   ptpcam -R 0x1016,0xd00f,0,0,0,0,shutter.bin

with the shutter.bin file only containing the shutter time in hex format.

response:

   01 00 00 00 04 00 00 00                         - ........        
   --------------------
   Camera: RICOH THETA S
   Sending generic request: reqCode=0x1016, params=[0x0000d00f,0x00000000,0x00000000,0x00000000,0x00000000]
   PTP: response OK

This looks pretty good. finally, one can than take an image as follows

   gphoto2 --capture-image-and-download

Answer 2

Here is the Jason Charcalla script on github, with an edited README.md file that includes info about

1. connecting over wifi from a laptop
2. multiple flags with examples for adjusting daylight, shade, cloudy-daylight and a lot more

Example screenshots also included.