The shutter cable has a 3.5mm male plug that connects to the DSUSB. Photo attached

Ok I committed preliminary support for DSUSB, please test tomorrow. When you connect, put DSUSB in the port and try. There is a good chance nothing would work, so have TeamViewer ready as well.

Was this ever tested? I have a D7000 that would need the same approach for longer than 30s exposures.

Nope, it's waiting for someone to test it. You must enable DEBUG LOGGING to a file (see my signature) _before_ you connect. Whether it works or not, send the INDI driver log.

I have the same problem with my Nikon and DSUSB... My shutter is limited to 30 secs and Ekos doesn't recognize the Shoestring device... Is there any update in that direction? Thanks for your effort in the name of all DSUSB users...
Edit: attached logs.

The INDI Nikon driver is almost empty, you need to enable debug logging to a file before you connect, then CONNECT and then send the logs. If you don't know how to do this, make your camera + DCUSB over SSH or TeamViewer and I'll check it out.

I got my DSUSB today and tested it with my daughter's Windows 10 machine, and it successfully exposed for 40 seconds. (gphoto can only go to 30 seconds, the slowest pre-programmed shutter speed.)

In my tests with INDI, the shutter was not triggered. The only file I have is the indi_nikon_ccd log file (attached). I'm on IRC with this user name if you would like to contact me in real time.

2nd try with full debugging attached. (note mapped to /dev/dsusb)

3rd try with DSUSB as shutter control attached.

With the 30s exposure issue sorted for indi_nikon_ccd, I tied another test with DSUSB. The shutter never fired. The log file is attached,

Using the updated files on github, I was able to capture as follows, 1 @ 40s, 3 @ 40s and 3 @120s. Log file is attached.

Interestingly, alternate files were debayered fits files. I ran an additional test with 10 x 40s exposures, prefixed Ten_DSUB_Test. In the attached screenshot, the 32.5MB files are gray (need debayering) and the 48.3 MB files are already debayered (open as RGB in PixInsight).

I have also attached the indi_nikon_ccd log of this capture session.

So can you state that the DSUSB will work with INDI?, I'm poised to get one for my D7000 but waiting until I know it works.

Regards

Chris

Yes, DSUSB is working with the version that's in the Git repository. I don't know when it will be in the PPA. The issue I had on bayered/debayered files should not be a problem if the images are saved to the camera's SD card in NEF format.