The Parent SmartApp wouldn’t affect CoRE, because either way the control is a Switch-type Device (the SmartApp is just there to handle discovery and dynamic IP address changes). CoRE should be able to easily toggle the switch on/off in both cases.
To clarify, my device handler won’t create a new Motion Detector device in SmartThings, it is just a switch that controls whether or not the SmartCam’s local motion detection is enabled.
It’s true that the SmartThings-SmartCam integration is limited, but you can (at least) have ST automatically record video during a SHM incident, in addition to viewing the camera live. I didn’t realize there was no way to download video clips - that is pretty bad.
It’s ready! I’ve created a new topic specifically for discussion related to my Device Handler, so check it out and let me know what you think over here: