Abstract: A system that monitors toilets for leaks using in-toilet monitors with pressure sensors that are placed underwater in toilet tanks. Monitors can be dropped into tanks without additional wiring or installation; they may be battery powered and may transmit data wirelessly. Data may be analyzed by a server that detects leaks or other malfunctions. Pressure data may be filtered to remove the effect of barometric pressure, to measure the height of water in the tank. The system may learn the flush pressure change pattern for each toilet; pressure changes that do not match this pattern may indicate problems such as leaks. Data may indicate the type of leak, such as an open flapper or a leaking valve. Toilet monitors may measure temperature, and the system may generate alerts when freezing appears imminent. The system may keep flush counts for each toilet to support maintenance and water consumption measurement.

Abstract: A climate control system that detects presence of a person in a room by analyzing small fluctuations in barometric pressure due to breathing. When the room is occupied, thermostatic control by the occupant may be enabled; when unoccupied, HVAC systems may be set to a low-power state. Barometric data may be processed using a bandpass filter that passes frequencies that correspond to typical human respiration rates. Barometric data may be used to determine when doors or windows are open or closed. Embodiments may connect to property management systems determine whether occupants are expected; when a room unoccupied but an occupant is expected, HVAC systems may be set to a standby state that saves power but allows temperature to return quickly to desired levels when a person enters the room. Occupancy detection may also use data from other sensors such as gas analyzers that detect compounds in exhaled breath.

Abstract: A climate control system that detects presence of a person in a room by analyzing small fluctuations in barometric pressure due to breathing. When the room is occupied, thermostatic control by the occupant may be enabled; when unoccupied, HVAC systems may be set to a low-power state. Barometric data may be processed using a bandpass filter that passes frequencies that correspond to typical human respiration rates. Barometric data may be used to determine when doors or windows are open or closed. Embodiments may connect to property management systems determine whether occupants are expected; when a room unoccupied but an occupant is expected, HVAC systems may be set to a standby state that saves power but allows temperature to return quickly to desired levels when a person enters the room. Occupancy detection may also use data from other sensors such as gas analyzers that detect compounds in exhaled breath.

Abstract: An automated network topology discovery system via smart power cords and system facility device management that uses smart power cords with integrated sensors and wireless interfaces to discover the network topology and manage devices in a facility. Locations of smart power cords may be automatically discovered using either cooperative or non-cooperative localization based on measurement of signal characteristics such as RSSI. Each cord may monitor power delivered to device(s), and measure variables including temperature, humidity, pressure. It may also act as a gateway to other devices in the vicinity. A central control station may manage the devices in the facility via the smart power cords. Data collected from smart power cords may be analyzed to provide alerts and management reports. Alerts may include attempted theft when a device is unplugged, environmental conditions or a staff member requesting assistance via an emergency alert forwarded through a smart power cord.

Abstract: A system that uses smart power cords with integrated sensors and wireless interfaces to manage devices in a facility such as a hotel. Each cord may monitor power delivered to an attached device, and may measure variables such as temperature, humidity, and pressure. It may also act as a gateway to other devices in the vicinity. A central control station may manage the devices in the facility via the smart power cords. Data collected from smart power cords may be analyzed to provide alerts and management reports. Illustrative alerts may warn of attempted theft when a device is unplugged, of environmental conditions that suggest mold risks or HVAC problems, or of a staff member requesting assistance via an emergency alert forwarded through a smart power cord. Locations of smart power cords may be automatically configured using either cooperative or non-cooperative localization based on measurement of signal characteristics such as RSSI.

Abstract: A smart power cord with integrated sensors and wireless interfaces to manage devices in a facility such as a hotel. Each cord may monitor power delivered to an attached device, and may measure variables such as temperature, humidity, and pressure. It may also act as a gateway to other devices in the vicinity. A central control station may manage the devices in the facility via the smart power cords. Data collected from smart power cords may be analyzed to provide alerts and management reports. Illustrative alerts may warn of attempted theft when a device is unplugged, of environmental conditions that suggest mold risks or HVAC problems, or of a staff member requesting assistance via an emergency alert forwarded through a smart power cord. Locations of smart power cords may be automatically configured using either cooperative or non-cooperative localization based on measurement of signal characteristics such as RSSI.