Is there any way to plug in a Wyze cam with SD card into say a raspberry pi, and have the PI somehow upload the contents of the SD card to a personal cloud service at regular intervals? Basically the idea behind wyze continuous recording add-on but done with our own hardware/cloud?
Not that I know of. There was a previous official project called the “maxdrive” but unfortunately that never came to be. I think the closest thing to what you’re wishing that’s currently available is using the RTSP firmware to stream the footage to a Blue Iris or Ispy type setup. Welcome to the forums!