In this unit, we will focus on two essential design patterns: Factory Method and Adapter. These patterns will help us establish a solid foundation for creating and adapting devices in our smart home system.

We will start by focusing on building the devices and defining the logic to create these devices using the Factory Method pattern. This will enable our smart home system to generate different types of devices, such as lights and fans, in a clean and reusable manner.

Then, we will use the Adapter pattern to ensure that these devices can seamlessly interact with other parts of the system that expect a different interface. For example, adapting a light or fan to work with a US plug interface.

Let's progress to the practice section to start implementing these components.