Patent ID: 8155664

Claim:
A building automation system of radios forming a network, the system comprising: a mesh network of wireless radios, each wireless radio having a receiver and/or a transmitter; a portable radio wirelessly interconnected with the mesh network, the portable radio having a receiver and a transmitter, wherein the portable radio is affixed on a movable item; wherein the mesh network is configured to (1) query the portable radio periodically, and (2) automatically determine the current location of the movable item within a building based upon signals and/or data automatically transmitted by the portable radio to the mesh network in response to the query from the mesh network; wherein the portable radio includes a power supply and a motion detector, the motion detector being configured to turn the portable radio on after detecting movement of the movable item, and upon waking up from a sleep mode, the portable radio transmits a message to the mesh network; and a handheld configured to generate and display a real-time location map of the wireless radios and the movable item in communication with the mesh network.