A system, method, and computer program for detecting proximity of a mobile device, including a circuit configured to detect proximity of a mobile device, and when detection occurs, enable a beacon circuit to wake up and advertise a presence. The circuit including a proximity sensor circuit; a wake signal generated by the proximity sensor circuit when the mobile device has been detected; and a beacon circuit, normally in a low power, non-communicating state, and while activated by the wake signal advertises a presence of the beacon circuit for a predetermined amount of time, after which the beacon circuit returns to a low power, non-communicating state.