g. , receive user inputs from a portable electronic device 166 1 to actuate bolt of the smart door lock 120, announce a person's approach or departure via audio or visual means, and/or control settings on a security system e. g. , to activate or deactivate the security system when occupants go and come. In some implementations, the smart doorbell 106 includes some or all of the components and features of the camera 118. In some implementations, the smart doorbell 106 includes a camera 118, and therefore, is also called “doorbell camera 106” in this application. The smart alarm system 122 may detect the presence of an individual within close proximity e. g. , using built in IR sensors, sound an alarm e. g. , through a built in speaker, or by sending commands to one or more external speakers, and send notifications to entities or users within/outside of the smart home network 100.

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With changing technological trends, vendors are facing the challenge of selecting an apt sensor for their next generation smart detectors.

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While many dogs are specially trained to provide security, any dog that barks at the presence of strangers can be an incredibly effective deterrent against crime.

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