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Home Automation Made Easy: Do It Yourself Know How Using UPB, INSTEON, X10, and Z-Wave by Dennis C. Brewer

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Chapter 3. Introduction to Control Protocols and Automation Process

The home automation process involves changing the existing state or condition of a device, an appliance, a system, or an electronic component from an internal or external stimulus or event, by a person taking an action, or as the result of the movement of time. To achieve that state change through automation, a control message must be sent to the device to be acted on. The condition or state changes can be a simple switching to an on-or-off status, or can be a more complex adjustment such as dimming to a preset level; and that device modification can be an incremental on or variable or both. The control messages are sent via any one of a number of defined home automation protocols. ...

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