Automation system

A method of controlling an environment in a region of a building using a building monitor, the method comprising:

• detecting, at a receiver of the building monitor, the presence of one or more electronic device, by observing a wireless signal over a network to which the receiver does not belong, thereby to indicate an occupancy level of the region of the building;
• determining, at a processor of the building monitor, whether the detected electronic device is indicative of occupancy in dependence on a time-varying characteristic of the wireless signal;
• receiving, at the processor of the building monitor, an environmental signal indicative of an environmental condition in the region of the building;
• and
• outputting, using the building monitor, a signal for controlling a state of a building system in dependence on the indicated occupancy level and the indicated environmental condition;
• in which the method comprises outputting the signal in dependence on a measure of correlation between the occupancy level and the environmental condition;
• in which, where:
• the indicated occupancy level is in a first occupancy band, and
• the indicated environmental condition is in a first environmental condition band, the method further comprising, using the building monitor, controlling the state of the building system to be in a first building system state;
• the method additionally comprising, using the building monitor, one or more of:
• controlling the state of the building system to be in a second building system state where the indicated occupancy level changes to a second occupancy band;
• and/or
• controlling the state of the building system to be in a third building system state where the indicated environmental condition changes to a second environmental condition band.

A non-transitory computer readable storage medium having stored thereon computer readable instructions that, when executed at a computer system, cause the computer system to perform a method of controlling an environment in a region of a building using a building monitor, the method comprising:

• detecting, at a receiver of the building monitor, the presence of one or more electronic device, by observing a wireless signal over a network to which the receiver does not belong, thereby to indicate an occupancy level of the region of the building;
• determining, at a processor of the building monitor, whether the detected electronic device is indicative of occupancy in dependence on a time-varying characteristic of the wireless signal;
• receiving, at the processor of the building monitor, an environmental signal indicative of an environmental condition in the region of the building;
• and
• outputting, using the building monitor, a signal for controlling a state of a building system in dependence on the indicated occupancy level and the indicated environmental condition;
• in which the method comprises outputting the signal in dependence on a measure of correlation between the occupancy level and the environmental condition;
• in which, where:
• the indicated occupancy level is in a first occupancy band, and
• the indicated environmental condition is in a first environmental condition band, the method further comprising, using the building monitor, controlling the state of the building system to be in a first building system state;
• the method additionally comprising, using the building monitor, one or more of:
• controlling the state of the building system to be in a second building system state where the indicated occupancy level changes to a second occupancy band;
• and/or
• controlling the state of the building system to be in a third building system state where the indicated environmental condition changes to a second environmental condition band.