US Patent 10117214 Triggering an action based on device presence

Systems and methods provide for triggering an action based on detection of one or more user devices. One or more signals from at least one user device are detected by at least one sensor in a target area. A sensor can be in operable communication with a location server to which the signals are relayed. Based on the signals detected, a determination is made as to whether the one or more signals exceed a predetermined threshold for signal strength in the target area. Based on a set of signals exceeding the predetermined threshold for signal strength, the location server triggers an action that corresponds to the target area.