IoT Core is the Google Cloud IoT gateway for sending data to the cloud. To work with IoT Core, click on IoT Core from the menu on the left. The first time we do this, we will need to enable the API, as shown in the following screenshot:
Starting with IoT Core
Building the device registry
When the IoT Core has been enabled, GCP will ask to create a device registry, as shown in the following screenshot:
Then, we have to provide a name for the device registry, which in our case will be iiot-book-registry. We also have to define two topics, one for signals, which will be signals, and one for statuses, which will be statuses.