Control Z1 HDR, NR and ISO with USB API?

what delay do you have it set to?

Another option is to check the camera status prior to taking the picture and if the camera status is not {"state": "done}, then check the status again.


saving settings

Did you try saving the _filter : hdr settings to MySettings?

I have not tested it, but I think if you save the hdr in mysettings, it will be preserved