Energy-saving control method for wireless low-power communication with emergency switch for Internet of Things

Abstract

A method for energy-saving control of wireless low-power communication with an emergency switch for the Internet of Things includes a main human body sensing sensor, multiple auxiliary sensors, and a central controller switch S. When the multiple auxiliary sensors sense a person, they report to the central controller switch S to turn on the power, while simultaneously clearing the main sensor's countdown to shut down the power. The multiple auxiliary human body sensing sensors B-F do not communicate and report immediately upon sensing a person, but instead communicate and report immediately upon the first sensing of a person, and then report the status after a certain delay upon subsequent triggering to achieve linkage, thereby realizing low-power operation. The main sensor A uses a slit or semi-shielded imaging focusing method (Fresnel lens) to ensure good sensor directionality and avoid false triggering. To provide humane service, the central controller switch S designed in each room has a "temporary outing" button to realize the function of increasing the delay time for "temporary outing" and also realize the switch function of the emergency state.

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