There are three ways you can register a device in your IoT Central application:
Automatically register devices when they first try to connect. This scenario enables OEMs to mass manufacture devices that can connect without first being registered. To learn more, see Automatically register devices.
Add devices in bulk from a CSV file. To learn more, see Import devices.
Use the Devices page in your IoT Central application to register devices individually. To learn more, see Add a device.