Ready to dive deeper into our smart home system development? This unit focuses on two more essential design patterns: Observer and Strategy. These patterns will enhance our system's functionality by enabling responsive security and flexible climate control.

Let’s refresh and build upon our project with these patterns.

First, we will use the Observer pattern to develop our smart home security system. This pattern will allow multiple home elements (like your mobile app) to respond to intrusion alerts from the security system.

Next, we will employ the Strategy pattern to create a flexible climate control system. This will let us change the way we control the temperature (heating or cooling) based on the strategy selected, ensuring that we can easily switch between different climate control models.

Great! Let’s move forward and start implementing these components.