Abstract: A monitoring system is configured to monitor a property. The system includes a sensor that is configured to generate sensor data that reflects an attribute of the property. The system further includes an HVAC system that is configured to generate and provide conditioned air to the property and that is configured to generate HVAC system data that reflects an attribute of the HVAC system. The system includes a monitor control unit that is configured to determine that the HVAC system is likely malfunctioning. The control unit is configured to receive the sensor data. The control unit is configured to determine that the HVAC system is likely operating correctly. The control unit is configured to determine a cause of the HVAC system transitioning from likely malfunctioning to likely operating correctly. The control unit is configured to update a model that is configured to identify causes of HVAC system malfunctions.

Abstract: A monitoring system is configured to monitor a property. The system includes a sensor that is configured to generate sensor data that reflects an attribute of the property. The system further includes an HVAC system that is configured to generate and provide conditioned air to the property and that is configured to generate HVAC system data that reflects an attribute of the HVAC system. The system includes a monitor control unit that is configured to determine that the HVAC system is likely malfunctioning. The control unit is configured to receive the sensor data. The control unit is configured to determine that the HVAC system is likely operating correctly. The control unit is configured to determine a cause of the HVAC system transitioning from likely malfunctioning to likely operating correctly. The control unit is configured to update a model that is configured to identify causes of HVAC system malfunctions.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for adjusting an indoor humidity at a property. One of the methods includes determining an estimated outdoor temperature in an area around a property; determining, using the estimated outdoor temperature, a target indoor humidity for the property; accessing data about the property; predicting, using the data about the property, whether an indoor humidity of the property will likely change within a threshold time period; determining, using the target indoor humidity and the prediction whether the indoor humidity of the property will likely change within the threshold time period, whether to adjust the indoor humidity of the property; and in response to determining to adjust the indoor humidity of the property, controlling, using the target indoor humidity, humidity equipment at the property to cause an indoor humidity at the property to move toward the target indoor humidity.

Abstract: Methods, systems, and apparatus for periodic water leak detection are disclosed. A method includes obtaining, using a water meter, water meter data representing the occurrence of water usage events at a property; determining, based on the water meter data, a periodicity of water usage events; determining that the periodicity of water usage events satisfies water leak criteria; and based on determining that the periodicity of water usage events satisfies water leak criteria, determining that a water leak exists at the property. Determining the periodicity of water usage events can include determining an average time between a start of sequential water usage events; and determining that the periodicity of water usage events satisfies water leak criteria can include determining that the average time between the start of sequential water usage events is less than a threshold time between the start of sequential water usage events.

Abstract: Systems and techniques are provided for identifying patterns activity at a facility that seem to precede alarm events. In some implementations, a monitoring system is configured to monitor a property and includes a sensor configured to generate sensor data. A monitor control unit is configured to receive the sensor data and based on the sensor data, determine an alarm status of the monitoring system. A monitoring application server is configured to receive the sensor data and data indicating the alarm status of the monitoring system. The server applies the sensor data to a model that determines an estimated alarm status of the monitoring system and determines the estimated alarm status of the monitoring system is different from the alarm status. Based on determining that the estimated alarm status of the monitoring system is different from the alarm status of the monitoring system, the server overrides the alarm status.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, are described for implementing a smart firearm safety device. The safety device attaches to a firearm having a trigger and a slot for receiving a magazine. The safety device includes a locking mechanism that attaches to the trigger to preclude depressing a trigger of the firearm and a sensor that determines an orientation of the firearm or a relative motion of the firearm to indicate detected movement of the firearm. The safety device also includes a radio device that receives parameter signals from the sensor indicating movement of the firearm. The radio device communicates with a component of a property monitoring system to receive a command to engage the locking mechanism to preclude depressing the trigger of the firearm based on parameter signals indicating a particular type of detected movement of the firearm.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a storage device, for monitoring a vehicle are disclosed. A vehicle monitoring system for monitoring a vehicle includes one or more processors and one or more computer storage media storing instructions that are operable, when executed by the one or more processors, to cause the one or more processors to perform operations. The operations include: receiving, from a vehicle occupancy monitor and by the vehicle monitoring system, vehicle occupancy data that indicates presence of a vehicle occupant; receiving, by the vehicle monitoring system and from a sensor, sensor data that indicates an attribute of the vehicle; analyzing, by the vehicle monitoring system, the vehicle occupancy data and the sensor data; and based on analyzing the vehicle occupancy data and the sensor data, performing a vehicle monitoring system action.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for integrating a monitoring system with one or more air quality sensors. The method includes receiving data indicating a level of volatile organic compounds within an area, determining an increase in the level of volatile organic compounds within the area, receiving video data that shows the area, detecting, from the video data, a new item of furniture within the area, sending a notification that indicates an increase in the level of volatile organic compounds is likely caused by the new item of furniture.

Abstract: Methods, systems, and apparatus for periodic water leak detection are disclosed. A method includes obtaining, using a water meter, water meter data representing the occurrence of water usage events at a property; determining, based on the water meter data, a periodicity of water usage events; determining that the periodicity of water usage events satisfies water leak criteria; and based on determining that the periodicity of water usage events satisfies water leak criteria, determining that a water leak exists at the property. Determining the periodicity of water usage events can include determining an average time between a start of sequential water usage events; and determining that the periodicity of water usage events satisfies water leak criteria can include determining that the average time between the start of sequential water usage events is less than a threshold time between the start of sequential water usage events.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a storage device, for monitoring a vehicle are disclosed. A vehicle monitoring system for monitoring a vehicle includes one or more processors and one or more computer storage media storing instructions that are operable, when executed by the one or more processors, to cause the one or more processors to perform operations. The operations include: receiving, from a vehicle occupancy monitor and by the vehicle monitoring system, vehicle occupancy data that indicates presence of a vehicle occupant; receiving, by the vehicle monitoring system and from a sensor, sensor data that indicates an attribute of the vehicle; analyzing, by the vehicle monitoring system, the vehicle occupancy data and the sensor data; and based on analyzing the vehicle occupancy data and the sensor data, performing a vehicle monitoring system action.

Abstract: Systems and techniques are described for pet monitoring during unattended delivery. In some implementations, a monitoring system monitors a property includes sensors located throughout the property and generates sensor data. A monitor control unit receives a first indication that a resident of the property will be receiving a delivery during a delivery time. Based on the sensor data and during the delivery time, the monitor control unit determines that a pet, that resides at the property, has been restrained. The monitor control unit provides, to a delivery person, a second indication that the pet at the property has been restrained.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for monitoring and operations of a wireless HVAC system. In some implementations, a method includes determining that a thermostat associated with the property is presently unavailable to send or receive a wireless communication; obtaining temperature data collected by one or more sensors located at the property; identifying one or more models for temperature monitoring at the property; determining an operation to be performed by an HVAC system based on the temperature data and the one or more models; and providing data indicating the operation to the HVAC system.

Abstract: Systems and techniques are described for alerting individuals of HVAC system issues in their home. In some implementations, a monitoring system monitors a property that includes sensors located throughout the property and generates sensor data. A monitor control unit receives thermostat data from a thermostat that indicates activity of the HVAC system and temperature history of the property. The monitor control unit applies the thermostat and the sensor data to an HVAC model that is trained using past sensor data, past thermostat data, past errors of the HVAC system. The monitor control unit determines an error of the HVAC system from the HVAC model output. The monitor control unit determines an action for likely correcting the error of the HVAC system. The monitor control unit provides, for output, data identifying the error of the HVAC system and the action for likely correcting the error of the HVAC system.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for integrating a monitoring system with one or more air quality sensors. The method includes receiving data indicating a level of volatile organic compounds within an area, determining an increase in the level of volatile organic compounds within the area, receiving video data that shows the area, detecting, from the video data, a new item of furniture within the area, sending a notification that indicates an increase in the level of volatile organic compounds is likely caused by the new item of furniture.

Abstract: Systems and techniques are described for pet monitoring during unattended delivery. In some implementations, a monitoring system monitors a property includes sensors located throughout the property and generates sensor data. A monitor control unit receives a first indication that a resident of the property will be receiving a delivery during a delivery time. Based on the sensor data and during the delivery time, the monitor control unit determines that a pet, that resides at the property, has been restrained. The monitor control unit provides, to a delivery person, a second indication that the pet at the property has been restrained.

Abstract: Methods, systems, and apparatus for nanosatellite-based property monitoring are disclosed. A method includes receiving satellite data related to conditions of a property monitored by a monitoring system; determining, based on the satellite data, that the property is at risk from a threat; requesting, from a sensor of the monitoring system, sensor data related to the threat; receiving, from the sensor, the sensor data related to the threat; and based on analyzing the sensor data related to the threat, performing one or more monitoring system actions. The threat may include one of a weather hazard, a security hazard, or a property damage hazard. The monitoring system actions can include sending an instruction to adjust a sensor or component of the monitoring system and can include sending, to a user device, a notification that the property is at risk from the threat.

Abstract: A monitoring system is configured to monitor a property. The system includes a sensor that is configured to generate sensor data that reflects an attribute of the property. The system further includes an HVAC system that is configured to generate and provide conditioned air to the property and that is configured to generate HVAC system data that reflects an attribute of the HVAC system. The system includes a monitor control unit that is configured to determine that the HVAC system is likely malfunctioning. The control unit is configured to receive the sensor data. The control unit is configured to determine that the HVAC system is likely operating correctly. The control unit is configured to determine a cause of the HVAC system transitioning from likely malfunctioning to likely operating correctly. The control unit is configured to update a model that is configured to identify causes of HVAC system malfunctions.

Abstract: Systems and techniques are described for cataloging objects in a property using a drone. In some implementations, a system monitors a property that includes a drone configured to survey the property. A control unit accesses data identifying items and provides instructions to the drone to locate the items. The control unit receives data identifying a location of a portion of the items, image data associated with each identified items, and data indicating remaining items not located. In response, the data identifying the remaining items and data indicating that the drone did not locate the remaining portion of the items are transmitted to a client device. The control unit receives data indicating a location within the property of a first group of the remaining portion of the items and data indicating that a second group of the remaining portion of the items are not located within the property.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for connected contact tracing system. The methods, systems, and apparatus include actions of receiving sensor data from multiple sensors, receiving exposure information including a person and an epidemiological event data, determining, from the sensor data, a contact exposure event including the person and another person, generating, from the sensor data and the exposure information, a risk score for the contact exposure event, and providing a notification including the risk score and information for the contact exposure event.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for an electronic knife holder. In some implementations, the electronic knife holder includes a microprocessor, a base member that has a first exterior surface containing multiple slots, a lock, and sensors corresponding to the multiple slots. Each of the multiple slots defines an interior space of the base member and is configured to receive a knife blade. When the lock is placed in a locked position, the lock locks one or more knives placed in one of the multiple slots. The sensors are configured to detect if a knife is present in one of the multiple slots.