US Patent 10229567 Hinge sensor for barrier

Methods and systems are described for determining operation of an openable barrier into a building. A method for determining an open state of a barrier includes confirming a first position for the barrier, the barrier having at least one hinge and a hinge sensor mounted to the at least one hinge, determining with the hinge sensor when the barrier changes position from the first position to a second position, and wirelessly transmitting data concerning the change in barrier position.