Hi. I ported adafruit's vc0706 library for maple, tested it.. (I didn't "save" photos to anywhere, but motion sensor works and filesizes seem about right) and so far it seems to be working..
You need a 5v power source for camera, plug serial wires to serial3 or any other 5v tolerant serial (I wasn't able to make it work with serial1, even though, this should have 3.3v ttl serial - so it's possible that my serial1 is now dead on one of my maples..)
I also added a example that works, MotionDetect2.. Although, it doesn't store images anywhere, but initializes camera, get's version, set's image size, gets image size, takes photo when triggered by internal motion sensor- (not pir) - and takes a picture and reports image's file size..
https://github.com/oskarirauta/Adafruit-VC0706-Serial-Camera-Library