Abstract: A monitoring system that is configured to monitor a property is disclosed. In one aspect, the monitoring system includes one or more sensors that are located throughout the property and that are configured to generate sensor data. The monitoring system further includes a drone that is configured to move throughout the property and generate additional sensor data. The monitoring system further includes a drone dock that is configured to receive the drone, wherein the drone is configured to continue generating the additional sensor data while the drone dock is receiving the drone. The monitoring system further includes a monitor control unit that is configured to receive the sensor data and the additional sensor data, analyze the sensor data and the additional sensor data, determine a status of the property, and provide, for output, data indicating the status of the property.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a storage device, for enabling drone activity in a property monitored by a property monitoring system without triggering a false alarm. In one aspect, the method includes actions of obtaining a location of the drone, identifying a first sensor installed at the property that is within a predetermined distance of the drone, detecting first sensor data generated by the first sensor that is within a predetermined distance of the drone, wherein the first sensor data includes data that is indicative of an event, determining whether a second sensor that is mounted to the drone is generating second sensor data that corroborates the event indicated by the first sensor data, and disregarding, by the property monitoring system, the first sensor data in determining whether to trigger an alarm.

Abstract: A monitoring system includes a camera that includes a removable primary power source and a secondary power source. The camera is configured to detect removal of the primary power source. The camera is configured to draw power from the secondary power source and generate a primary power source removal notification indicating that the primary power source has been removed from the camera. The monitoring system includes a monitor control unit that is configured to receive the primary power source removal notification. The monitor control unit is configured to determine whether a primary power source removal request was received within a period of time before receipt of the primary power source removal notification, the primary power source removal request indicating that the primary power source will be removed within the period of time. The monitor control unit is configured to perform a monitoring system action.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a storage device, for using a drone to test monitoring system sensors. In one aspect, the drone perform operations that include navigating from a first location of a property towards a second location of the property, detecting a sensor that is installed at the property, interrupting, by the drone, navigation through the property from the first location of the property towards the second location of the property to initiate a test of the detected sensor and (ii) determining a sensor test type for the detected sensor, administering a sensor test to the detected sensor, wherein the sensor test is based on the determined sensor test type, evaluating results of the administered test, storing data describing the results of the administered test, and continuing navigation through the property towards the second location of the property or towards another location of the property.

Abstract: Techniques are described for zooming in video. In some implementations, a first video stream from a camera is provided, a digitally zoomed portion of the first video stream from the camera is provided, a second video stream from the camera corresponding to the digitally zoomed portion of the first video stream is requested, and the digitally zoomed portion of the first video stream is replaced with the second video stream from the camera.

Abstract: An inductor has first and second terminals. A first switch is coupled between the first terminal and a voltage supply terminal. A second switch is coupled between the first terminal and a negative output supply terminal. A third switch is coupled between the second terminal and a positive output supply terminal. A fourth switch is coupled between the second terminal and a ground terminal. A controller is coupled to the first, second, third and fourth switches. The controller is configured to provide: an inductor charge mode; a positive boost mode; a negative boost mode; a first rest state in which the controller closes the first switch and opens the second, third and fourth switches; and a second rest state in which the controller closes the fourth switch and opens the first, second and third switches.

Abstract: A circuit includes a phase-locked loop having a phase-locked loop output to provide a first phase signal and a second phase signal phase delayed with respect to the first phase signal. The circuit further includes a digital circuit having a digital circuit input and an output. The digital circuit input couples to the phase-locked loop output. On the digital circuit output, the digital circuit is configured to provide a first digital-to-analog converter (DAC) enable signal and a second DAC enable signal. The circuit also includes first and second DACs. The first DAC is coupled to the digital circuit. The first DAC has a first enable input coupled to the digital circuit output to receive the first DAC enable signal. The second DAC is coupled to the digital circuit. The second DAC has a second enable input coupled to the digital circuit output to receive the second DAC enable signal.

Abstract: A method includes generating motion data that reflects movement of the tracking device, comparing the motion data to a motion threshold, determining that the motion data satisfies the motion threshold, based on determining that the motion data satisfies a motion threshold, activating the communication device, receiving, by the monitoring system and from the tracking device, the motion data, based on the motion data, determining, by the monitor system, that the tracking device is outside of a threshold distance of a property monitored by the monitoring system, based on determining that the tracking device is outside of the threshold distance of the property, providing, for output by the monitoring system and to the tracking device, an instruction to transmit location data at a particular frequency, and based on the location data, providing, for output by the monitoring system, data indicating a location of the tracking device.

Abstract: One example relates to a device that includes an activity monitor. The activity monitor includes a bus interface having inputs coupled to receive signals from a bus and having outputs coupled to provide signals to an other device. The activity monitor monitors the bus for a message directed to a predefined address that is associated with the other device in response to detecting that the other device is a low power sleep mode, the activity monitor outputs the predefined address to the other device to enable the other device to capture the predefined address, via the bus interface, in response to the monitored address matching the predefined address that is associated with the other device.

Abstract: At least one aspect of the present disclose is directed towards a temperature control device that includes a face plate, a housing, and an adjustment mechanism. The housing may protrude away from the rear side of the face plate. The housing may include a mounting mechanism that includes a set of clamps configured to engage at least a portion of an inner surface. The set of clamps may be adjustable based on alterations to the adjustment mechanism. The housing may also include one or more cavities that may be configured to receive at least a portion of the set of clamps when the set of clamps is collapsed into the housing.

Abstract: A system includes an inductor and a first switch coupled between a first end of the inductor and a voltage supply node. The system also includes a second switch coupled between the first end of the inductor and a negative output supply node. The system also includes a third switch coupled between a second end of the inductor and a positive output supply node. The system also includes a fourth switch coupled between the second end of the inductor and a ground node. The system also includes a controller coupled to the first, second, third, and fourth switches. The controller is configured to provide an inductor charge mode, a positive boost mode, a negative boost mode, a first rest state involving the first switch, and a second rest state involving the fourth switch.

Abstract: A computer-implemented method includes receiving a sample image of an area of a property, identifying a moving object from the sample image, determining a site in the property based on the identified moving object, determining an optical pattern to project at the site based on the identified moving object, and transmitting an instruction to a projector to project the determined optical pattern at the determined site.

Abstract: An ultra-light, pourable, self-drying cementitious product with improved density control and ultra-low water demand is provided. Compositions and methods for making the products are provided as well, including compositions and methods with ultra-low water demand.

Abstract: One example relates to a device that includes an activity monitor. The activity monitor includes a bus interface having inputs coupled to receive signals from a bus and having outputs coupled to provide signals to an other device. The activity monitor monitors the bus for a message directed to a predefined address that is associated with the other device in response to detecting that the other device is a low power sleep mode, the activity monitor outputs the predefined address to the other device to enable the other device to capture the predefined address, via the bus interface, in response to the monitored address matching the predefined address that is associated with the other device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a storage device, for using a drone to test a sensor. In one aspect, the method includes actions of detecting a message (i) broadcast by the drone and (ii) indicating that the drone is going to administer a test of a sensor, determining, by the monitoring system and based on the message and (i) sensor data generated by the sensor in response to the administration of the test, by the drone, within a predetermined period of time of the message or (ii) a lack of sensor data generated by the sensor in response to the administration of the test, by the drone, within a predetermined period of time of the message, whether the sensor is functioning properly, and in response to a determination that the sensor is not functioning properly, storing data indicating that the sensor is not functioning properly.

Abstract: A monitoring system that is configured to monitor a property is described. The monitoring system includes a sensor that includes a battery and that is configured to generate sensor data based on activity in a portion of the property that is within a field of view of the sensor. The monitoring system further includes a monitor control unit that is configured to: after replacement of a battery of the sensor, receive and analyze the sensor data, based on analyzing the sensor data, determine a status of the portion of the property without recalibrating the field of view of the sensor, and provide, for output, a notification that includes data describing the status of the portion of the property.

Abstract: A system includes an inductor and a first switch coupled between a first end of the inductor and a voltage supply node. The system also includes a second switch coupled between the first end of the inductor and a negative output supply node. The system also includes a third switch coupled between a second end of the inductor and a positive output supply node. The system also includes a fourth switch coupled between the second end of the inductor and a ground node. The system also includes a controller coupled to the first, second, third, and fourth switches. The controller is configured to provide an inductor charge mode, a positive boost mode, a negative boost mode, a first rest state involving the first switch, and a second rest state involving the fourth switch.

Abstract: A monitoring system includes a camera that includes a removable primary power source and a secondary power source. The camera is configured to detect removal of the primary power source. The camera is configured to draw power from the secondary power source and generate a primary power source removal notification indicating that the primary power source has been removed from the camera. The monitoring system includes a monitor control unit that is configured to receive the primary power source removal notification. The monitor control unit is configured to determine whether a primary power source removal request was received within a period of time before receipt of the primary power source removal notification, the primary power source removal request indicating that the primary power source will be removed within the period of time. The monitor control unit is configured to perform a monitoring system action.

Abstract: A method includes generating motion data that reflects movement of the tracking device, comparing the motion data to a motion threshold, determining that the motion data satisfies the motion threshold, based on determining that the motion data satisfies a motion threshold, activating the communication device, receiving, by the monitoring system and from the tracking device, the motion data, based on the motion data, determining, by the monitor system, that the tracking device is outside of a threshold distance of a property monitored by the monitoring system, based on determining that the tracking device is outside of the threshold distance of the property, providing, for output by the monitoring system and to the tracking device, an instruction to transmit location data at a particular frequency, and based on the location data, providing, for output by the monitoring system, data indicating a location of the tracking device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a storage device, for enabling drone activity in a property monitored by a property monitoring system without triggering a false alarm. In one aspect, the method includes actions of obtaining a location of the drone, identifying a first sensor installed at the property that is within a predetermined distance of the drone, detecting first sensor data generated by the first sensor that is within a predetermined distance of the drone, wherein the first sensor data includes data that is indicative of an event, determining whether a second sensor that is mounted to the drone is generating second sensor data that corroborates the event indicated by the first sensor data, and disregarding, by the property monitoring system, the first sensor data in determining whether to trigger an alarm.