Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing sensor communications in a monitored environment. One of the methods includes receiving, by a server and from a device that is accepted to connect with a first network using acceptance data that includes a first key indicating the device is associated with the first network, a request a) to join a second network different from the first network b) that identifies the first key; determining, by the server and using the identification of the first key in the request, that the device that transmitted the request is associated with the first network; and providing, by the server, an notification i) to a user associated with the first network ii) indicating that the device has moved outside the first network.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for temperature control. In some implementations, a method includes obtaining first temperature data associated with a first climate control component of a first dwelling of a property; obtaining second temperature data associated with a second climate control component of a second dwelling of the property; determining a leak effect between the first dwelling and the second dwelling using the first temperature data and the second temperature data; determining an instruction to adjust operation of the first climate control component using the leak effect; and providing the instruction to the first climate control component.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for property communication and access control. In some implementations, a corresponding method includes receiving a data sequence input from a property related to an event at the property; comparing the data sequence input to one or more sequence templates to determine a matching sequence template; based on the matching sequence template, determining one or more relevant actions to be performed; performing the one or more relevant actions using the data sequence input; and providing feedback related to the event or the one or more relevant actions.

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: A computer implemented method includes receiving one or more user set preferences for detecting a hub alarm condition and one or more actions to perform in response to detecting a hub alarm condition, receiving, from the output of the security panel, data indicating that a traditional alarm condition occurred, based on receiving data indicating a traditional alarm condition occurred at the monitored property, receiving sensor data from at least one wireless sensor in a vicinity of a hardwired sensor associated with the traditional alarm condition, determining, based on the sensor data received from at least one wireless sensor in a vicinity of the hardwired sensor associated the traditional alarm condition, that the sensor data satisfies a condition, and in response to determining that the sensor data satisfies a condition, performing an action.

Abstract: Techniques are described for tracking intruders of a monitored property by the unique identifying characteristics or “digital fingerprints” of electronic devices carried by the intruders. A system detects an alarm event at a monitored property based on output from at least one sensor located at the monitored property. In response to detecting the alarm event at the monitored property, the system initiates a process to gather electronic identifiers for mobile electronic devices located within the monitored property at a time corresponding to the detected alarm event. The system determines electronic identifiers for the mobile electronic devices located within the monitored property at a time corresponding to the detected alarm event. The system stores in electronic storage, information indicating the determined electronic identifiers for the mobile electronic devices located within the monitored property at a time corresponding to the detected alarm event.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, are disclosed for implementing a smart dehum circuit that powers a chime which outputs audio in response to detection of a trigger event by a video doorbell. The circuit includes a detector circuit configured to generate a power signal in response to determining that an output voltage signal of a first circuit exceeds a threshold voltage. The circuit also includes a microcontroller coupled to the detector circuit. The microcontroller is configured to generate a chime power signal based on the power signal of the detector circuit. The chime power signal is generated to power the chime in response to detection of the trigger event by the video doorbell.

Abstract: A circuit is described for powering a video doorbell in signal communication with a chime that outputs audio. The circuit includes a switch coupled to a set of input power wires that supply power to the circuit from a source. The switch is operable to switch between: i) a first path of the circuit that supplies power to the video doorbell using the input power wires and ii) a second path of the circuit that supplies power to the chime using the input power wires. The circuit includes a controller that controls the switch to iteratively switch between the first path and the second path based on a timing metric. In response to detection of an object by the video doorbell, the iterative switching between the first path and the second path concurrently powers the video doorbell and the chime without relying on battery power at the video doorbell.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for monitoring an HVAC system. One of the methods includes receiving pressure data from one or more sensors monitoring a supply air duct of an HVAC system at a property that indicates a pressure in the HVAC system; determining, using the pressure data, that the pressure satisfies a pressure threshold for the HVAC system; and in response to determining that the pressure satisfies the pressure threshold, adjusting an actuator-controlled damper between the supply air duct and a return air duct or adjusting a fan speed of the HVAC system.

Abstract: Virtual sensor technology, in which a camera is controlled to capture at least one configuration image of an area monitored by a monitoring system and input is received that defines one or more characteristics of the at least one configuration image that enable sensing of an event in the area. Based on the received input, configuration data used in sensing the event is generated and stored. After storage of the configuration data, the camera is controlled to capture one or more images of the area, the one or more images are analyzed based on the configuration data, and occurrence of the event is detected based on the analysis of the one or more images. Based on detecting occurrence of the event, a transmitting device is controlled to send, to a controller of the monitoring system, a signal that indicates the detection of the occurrence of the event.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for monitoring air quality with multiple sensing devices. The methods, systems, and apparatus include actions of: obtaining first sensor data from a sensor that is not an air quality sensor, determining that the first sensor data satisfy a first air quality criterion, in response to determining that the first sensor data satisfy the first air quality criterion, obtaining second sensor data from an air quality sensor, determining that the second sensor data satisfy a second air quality criterion, and based on a determination that the second sensor data satisfy the second air quality criterion, activating an air quality device.

Abstract: Methods, and systems including computer programs encoded on a computer storage medium, for automated climate control. In one aspect, a monitoring system includes an indoor climate control device that is configured to adjust an indoor climate setting of a property, a sensor that is located at the property and configured to generate sensor data that reflects an attribute of the property, and a monitor control unit. The monitor control unit is configured to receive the sensor data, and receive, from an onboard control unit for a first vehicle associated with the property, data that reflects a status of the first vehicle. Based on the data that reflects the status of the first vehicle and the sensor data, the monitor control unit determines the indoor climate setting for the indoor climate control device, and provides instructions to adjust the indoor climate control device to the indoor climate setting.

Abstract: Techniques are described for handling duress input. For example, techniques are described for handling duress input provided to a mobile application that controls a monitoring system located at a fixed property.

Abstract: Techniques are described for providing control of a monitoring system (e.g., a home alarm or security system) using one or more mobile devices. In some implementations, a native mobile device application enables use of a mobile device as a security/automation system keypad and controller for a home security system. In these implementations, the mobile device, using the native mobile device application, checks real time status of system and sensors, arms/disarms system, turns lights on/off, looks in on live video of security cameras, reviews history of system events, reviews saved video clips, monitors/changes thermostat settings, and performs other features of a traditional security keypad in a home security system.

Abstract: A computer-implemented method including receiving, by a monitoring system that is configured to monitor a property and from a touchless doorbell device that includes a camera and a motion sensor, an image, analyzing, by the monitoring system, the image, based on analyzing the image, determining that the image likely includes a representation of a person, and based on determining that the image likely includes a representation of a person, performing a monitoring system action.

Abstract: Image surveillance and reporting technology, in which an event that is indicative of potential physical activity within an area corresponding to a location of a camera unit is detected. In response to detection of the event, the camera unit is controlled to capture one or more images of the area corresponding to the location of the camera unit. The one or more images captured by the camera unit are analyzed to determine whether the one or more images include image data that is indicative of relevant physical activity within the area corresponding to the location of the camera unit. The one or more images are handled based on the determination of whether the one or more images include image data that is indicative of relevant physical activity within the area corresponding to the location of the camera unit.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for fall detection using data for a person's shadow. One of the methods includes obtaining, from a camera, an image of a portion of a property; determining whether a shadow is likely depicted in the image; in response to determining that a shadow is likely depicted in the image, determining whether the shadow in the image likely represents a potentially falling person; and in response to determining that the shadow in the image likely represents a potentially falling person, performing one or more actions for the potentially falling person.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, are described for performing automated mapping of sensors at a location of a property. A monitoring server of a system for monitoring a property obtains mapping information that indicates navigable areas at the property. A drone that communicates with the monitoring server is used to navigate the property. In response to the drone navigating the property, sensors and their respective location at each navigable areas are identified based on the mapping information. The monitoring server associates sensors at each area with a corresponding location of the sensor in a data model of the property. Labels descriptive of the respective sensors are generated based on the location of the identified sensors. The monitoring server determines a mapping of a label to a respective sensor associated with the data model of the property.

Abstract: Monitoring system alert technology, in which monitoring system data is accessed from a monitoring system that is located in a property of a user and the monitoring system data is analyzed against one or more rules that define alerts provided for the monitoring system. Based on the analysis, a determination is made that an alert for the monitoring system is needed and conditions for providing the alert are accessed. Location of a mobile device of a user associated with the monitoring system and timing related to providing the alert are monitored. The monitored location of the mobile device and the monitored timing are analyzed with respect to the accessed conditions. Based on the analysis, a determination is made that the accessed conditions for providing the alert are met and the alert is output at the mobile device.

Abstract: A method is described that determines that a replacement node device has been connected to a mesh network, the replacement node device corresponding to an original node that has been removed from the mesh network. In response to determining that the replacement node device has been connected to the mesh network, network topology data is accessed that specifies one or more data routing configurations that are each associated with a node device included in the mesh network. From among the one or more data routing configurations specified by the network topology data, a particular data routing configuration is identified that is associated with the original node device that has been removed from the mesh network. Data that specifies the particular data routing configuration that is associated with the original node device that has been removed from the mesh network is provided to the replacement node device.