A method for controlling door access in a gunshot event includes connecting door locks with a control device. Each door lock retains its unlocking authority when no gunshot event is detected. A gunshot event information containing the gunshot location is sent to the control device when the gunshot event is detected, and the control device reports the gunshot location to the police system. At least one of the door locks near the gunshot location is set to the locking state, and the unlocking authority of the at least one door lock is revoked. Furthermore, the control device simultaneously sets the door locks to a locking state or an unlocked state through physical connection with or disconnection from an unlocking device. When the unlocking device is removed, the control device enters a first priority emergency state, such that all door locks are set to the locking state and lose unlocking authority.

A method for controlling door access in a gunshot event includes connecting door locks with a control device. Each door lock retains its unlocking authority when no gunshot event is detected. A gunshot event information containing the gunshot location is sent to the control device when the gunshot event is detected, and the control device reports the gunshot location to the police system. At least one of the door locks near the gunshot location is set to the locking state, and the unlocking authority of the at least one door lock is revoked. Furthermore, the control device simultaneously sets the door locks to a locking state or an unlocked state through physical connection with or disconnection from an unlocking device. When the unlocking device is removed, the control device enters a first priority emergency state, such that all door locks are set to the locking state and lose unlocking authority.

A distributed threat detection system that can be installed in a facility, such as a school, office, factory, entertainment venue, etc. and monitor for trigger events that may be indicative of a threat. Sensors and/or detectors are distributed throughout the facility and the system is used to interconnect all of the sensors into a single control master. The sensors are distributed and interconnected through the use of distributed IP loads fed to a central control unit over PoE connections.

A distributed threat detection system that can be installed in a facility, such as a school, office, factory, entertainment venue, etc. and monitor for trigger events that may be indicative of a threat. Sensors and/or detectors are distributed throughout the facility and the system is used to interconnect all of the sensors into a single control master. The sensors are distributed and interconnected through the use of distributed IP loads fed to a central control unit over PoE connections.

A system for determining a source location of a firearm discharge includes a plurality of monitoring stations and a central processing system. Each of the monitoring stations determines a time value of identification of a firearm discharge signature and transmits the time value. The central processing system 1) receives the time value from each of the monitoring stations; 2) determines, based on the time values, a geographic area that includes the source location of the firearm discharge; 3) determines a time of acoustic propagation from each of a plurality of randomly selected locations within the geographic area to each of the monitoring stations; 4) identifies the source location of the firearm discharge as the selected location for which difference in the time of acoustic propagation to each of the monitoring stations is closest to difference in the time values received from each of the monitoring stations.

A system for determining a source location of a firearm discharge includes a plurality of monitoring stations and a central processing system. Each of the monitoring stations determines a time value of identification of a firearm discharge signature and transmits the time value. The central processing system 1) receives the time value from each of the monitoring stations; 2) determines, based on the time values, a geographic area that includes the source location of the firearm discharge; 3) determines a time of acoustic propagation from each of a plurality of randomly selected locations within the geographic area to each of the monitoring stations; 4) identifies the source location of the firearm discharge as the selected location for which difference in the time of acoustic propagation to each of the monitoring stations is closest to difference in the time values received from each of the monitoring stations.

In one embodiment, an apparatus includes: an integrated circuit comprising a microcontroller to control operation of one or more light sources and a wireless transceiver to enable communication between the apparatus and a remote service provider; and at least one microphone coupled to the integrated circuit to detect audio information. In response to receipt of a first audio sample, the microcontroller can detect an emergency event and communicate an indication of the emergency event to the remote service provider.

In one embodiment, an apparatus includes: an integrated circuit comprising a microcontroller to control operation of one or more light sources and a wireless transceiver to enable communication between the apparatus and a remote service provider; and at least one microphone coupled to the integrated circuit to detect audio information. In response to receipt of a first audio sample, the microcontroller can detect an emergency event and communicate an indication of the emergency event to the remote service provider.

A first thermostat of a building includes a communications interface configured to communicate with at least one of a second thermostat or a network server, a user interface configured to display information to a user and receive input from the user, and a processing circuit. The processing circuit is configured to generate building navigation direction data for user navigation through the building, cause the user interface to display a first building navigation direction based on the generated building navigation direction data, and cause, via the communications interface, the second thermostat to display a second building navigation direction on a second display of the second thermostat based on the generated building navigation direction data.

A first thermostat of a building includes a communications interface configured to communicate with at least one of a second thermostat or a network server, a user interface configured to display information to a user and receive input from the user, and a processing circuit. The processing circuit is configured to generate building navigation direction data for user navigation through the building, cause the user interface to display a first building navigation direction based on the generated building navigation direction data, and cause, via the communications interface, the second thermostat to display a second building navigation direction on a second display of the second thermostat based on the generated building navigation direction data.