Smart homes are among today’s emerging technologies. The increasingly advanced electronic circuits built in various home appliances have created the possibility and necessity for such devices to be able to communicate with each other as well as with their users, and also to be capable of autonomous event response.
In the course of my thesis, I created a smart power switch with ZigBee and Bluetooth interfaces and e-metering capabilities. It features instantaneous power and energy metering on its five remotely switchable outputs, two of which offer power control.
It also provides the means to send reports on several of its attributes (instantaneous power consumption, consumed energy, dimmer level and outlet on / off) to other devices (such as wall-mounted touchscreen control panel, portable remote control, home gateway, etc.). The reports can be configured to be time-based and / or change-based.
Each of the outlets (endpoints) can be associated with groups, which may include endpoints of other devices, too. Arbitrary scenes can be added to each group. Scenes hold attribute configurations characteristic of specific scenarios, for example “Movie mode” or “Not at home”, and can be recalled by issuing a single command.
The extensive features of the device fulfil the needs of both basic and advanced users. While it is an ideal “starter device”, which is operational even without a preinstalled home automation network due to its Bluetooth user interface, it also provides facilities for integration in an extended ZigBee HA (Home Automation) network.
A promising way to exploit the full potential of the Bluetooth connection could be by creating a mobile phone client application – possibly for multiple platforms.