I bought a smart thermostat called NEST (see nest.com) And also a couple of nest protects. They all have motion detectors.
Now I want to build a sort of alarm system with an arduino UNO. So basically I want to connect an arduino UNO to the nest network at home and read "the motions" (if there is a motion detected, my arduino UNO knows it and then I can set an alarm, send a message, ...)
But the problem is I have no ID how to start :-*
Is there anyone who can help me?