In this scheme, the Raspberry Pi hosts a simple Web server that serves the remote control Web page to any devices that log on. It's important to say that any number of devices can log onto the remote server, and all the displays remain synchronized, meaning when a device is activated by any one of them, that device is shown as activated on all the remote displays, even though the content delivery scheme is a simple HTTP transaction, nothing exotic. Now, based on project's description, use software engineering methods to give the design points of this system. Desktop Software link Insteon extension library Raspberry Pi Network link Insteon controller House wiring Wired/wireless links To Web browsers located anywhere link Low-voltage electrical link Phone GPIO relay driver circuit Insteon switches I controls High voltage electrical link Electrical loads - lights, motors, appliances High voltage electrical link