1. An energy constrained system comprising: (a) a primary processor having a low power consumption mode; (b) an electronic sensor adapted to continuously provide an output that reflects a presently sensed condition; and (c) reconfigurable event driven hardware coupled between the primary processor and the electronic sensor with an output; wherein the reconfigurable event driven hardware is adapted to continuously monitor the output of the electronic sensor for a predetermined sensed condition that is configured by the primary processor, and the reconfigurable event driven hardware is further adapted to initiate communication with the primary processor in response to an occurrence of the predetermined sensed condition while the primary processor is in the low power consumption mode; and wherein the reconfigurable event driven hardware consumes less power than the electronic sensor.