Use HomePod mini as an Intercom
This is one of the newest features of the HomePod. You can use your HomePod mini as an intercom to send messages to anyone around your house. You have the option to send messages to the whole house or to specific rooms.
What’s cool is that you don’t need to have more than one HomePod mini or HomePod for this to work. You can send intercom messages to and from your iPhone, iPad, Apple Watch, AirPods, and even your iPod Touch. You can also send intercom messages from your car using CarPlay.
All you need to do is set it up and then ask Siri something like, “Hey Siri, intercom. It’s time to go.'”