Abstract: A security device, such as a passive infra-red motion detector (1) is provided with a plurality of fasteners (15, 25). One fastener (25) removably fastens a lens (4) to a housing of the passive infra-red detector, such that the lens (4) can be removed from the outside of the housing, whilst the other fastener (15) fastens a front section (2) of the housing to the rear section (3). Both fasteners (15, 25) are transparent/translucent and act as light guides.

Abstract: A wireless mesh network comprises a controller and a plurality of wireless networked devices arranged to transmit messages to and receive messages from the controller. The plurality of devices are arranged in zones, such that a device that is arranged to communicate directly with the controller is designated a “Zone 1” device and a device that is arranged to communicate with the controller via a “Zone 1” device is designated a “Zone 2” device. One or more or each of the plurality of devices periodically sends a positioning message to the controller to determine its zone and if it can communicate directly with the controller it determines that it is a “Zone 1” device and if it cannot communicate directly with the controller, but it can communicate with the controller via a “Zone 1” device and therefore arranged to do so, it determines that it is a “Zone 2” device.

Abstract: A mesh network comprises a controller and a plurality of mesh-networked devices, operable to communicate with the controller. The controller and the plurality of mesh-networked devices comprise timing units, and are operable to communicate in accordance with a frequency hopping sequence. The mesh-networked devices switch between a transmit mode, in which they are capable of transmitting messages to one or more other mesh-networked device and/or the controller and an inactive mode, in which they are unable to transmit to or receive messages from one or more other mesh-networked devices or the controller. The timing units of the mesh-networked devices are synchronised and the mesh-networked devices are operable to switch to the transmit mode at pseudorandom time intervals.

Abstract: A wireless mesh network comprises a controller and a plurality of wireless networked devices arranged to transmit messages to and receive messages from the controller. The plurality of devices are arranged in zones, such that a device that is arranged to communicate directly with the controller is designated a “Zone 1” device and a device that is arranged to communicate with the controller via a “Zone 1” device is designated a “Zone 2” device. One or more or each of the plurality of devices periodically sends a positioning message to the controller to determine its zone and if it can communicate directly with the controller it determines that it is a “Zone 1” device and if it cannot communicate directly with the controller, but it can communicate with the controller via a “Zone 1” device and therefore arranged to do so, it determines that it is a “Zone 2” device.

Abstract: A mesh network comprises a controller and a plurality of mesh-networked devices, operable to communicate with the controller. The controller and the plurality of mesh-networked devices comprise timing units, and are operable to communicate in accordance with a frequency hopping sequence. The mesh-networked devices switch between a transmit mode, in which they are capable of transmitting messages to one or more other mesh-networked device and/or the controller and an inactive mode, in which they are unable to transmit to or receive messages from one or more other mesh-networked devices or the controller. The timing units of the mesh-networked devices are synchronised and the mesh-networked devices are operable to switch to the transmit mode at pseudorandom time intervals.

Abstract: A method of measuring system integrity and robustness to link failure for use with a wireless signaling system is described. The measuring system can calculate the number of unique communication routs available for message transfer between an initiating device and a target device wherein unique routes are non-converging and defined by message source and signal strength data derived from a plurality of system devices.

Abstract: A method for concerted synchronization of data across a wireless mesh network comprises transmission of a broadcast message to a target device via a predicted route that is capable of being acknowledged by at least one network device not on the predicted route. The data is assimilated from at least one network device, and is capable of addition to a broadcast message. In this way, it is possible to synchronize a plurality of network devices via one outgoing broadcast message and one incoming broadcast message.

Abstract: A network arrangement of low powered monitored devices which are linked together along with a control device in a mesh network configuration. Each of the security devices and the control devices are powered by an on board power source. To maximize the lifetime of the of the power supply the devices are monitored periodically and synchronously, and the devices are only activated during monitoring.

Abstract: A method of route prediction and device configuration for enhancing data transfer across a wireless network arrangement by using routing information to predict data transfer routes and configuring devices to switch between states to reduce data transference time and power consumption of a wireless network arrangement.

Abstract: A method of transmitting electronic signals for use with a wireless network arrangement comprising assimilating and storing data relating to successful communication routes within the network arrangement and the transmission and receiving of electronic signals between the minimum number of devices in wireless network arrangement to improve efficiency of data communication and to reduce the power consumption of the network.

Abstract: A method of measuring system integrity and robustness to link failure for use with a wireless signaling system is described. The measuring system can calculate the number of unique communication routs available for message transfer between an initiating device and a target device wherein unique routes are non-converging and defined by message source and signal strength data derived from a plurality of system devices.

Abstract: A method of route prediction and device configuration for enhancing data transfer across a wireless network arrangement by using routing information to predict data transfer routes and configuring devices to switch between states to reduce data transference time and power consumption of a wireless network arrangement.

Abstract: A method of transmitting electronic signals for use with a wireless network arrangement comprising assimilating and storing data relating to successful communication routes within the network arrangement and the transmission and receiving of electronic signals between the minimum number of devices in wireless network arrangement to imp v efficiency of data communication and to reduce the power consumption of the network.

Abstract: A method for concerted synchronisation of data across a wireless mesh network comprises transmission of a broadcast message to a target device via a predicted route that is capable of being acknowledged by at least one network device not on the predicted route. The data is assimilated from at least one network device, and is capable of addition to a broadcast message. In this way, it is possible to synchronise a plurality of network devices via one outgoing broadcast message and one incoming broadcast message.

Abstract: A network arrangement of low powered monitored devices which are linked together along with a control device in a mesh network configuration. Each of the security devices and the control devices are powered by an on board power source. To maximise the lifetime of the of the power supply the devices are monitored periodically and synchronously, and the devices are only activated during monitoring.