Patent attributes
A system for monitoring a presence of an object in a volume of space can include a controller and a first electrical device coupled to the controller, where the first electrical device is disposed in the volume of space and includes a first receiver, where the first receiver has a first communication range. The system can also include an object having a beacon having an object communication range, where the beacon sends multiple signals that are received by the first receiver when the object communication range overlaps with the first communication range, where each signal includes an identification of the object. The controller can determine a first point in time when none of the signals is received, where the controller determines at the first point in time that the object is removed from a first location defined by the first communication range.
