Data cannot be sent or received by a device until it is registered and activated. You can register devices individually or in a batch using CSV files. Devices are indirectly or directly connected to Oracle Internet of Things Cloud Service. Indirectly connected devices connect to a gateway and the gateway forwards data to Oracle Internet of Things Cloud Service. Indirectly connected devices are automatically registered and activated by the gateway. A device adapter for the indirectly connected device’s protocol must be installed on the gateway to allow the exchange of data between the gateway, the indirectly connected device, and Oracle Internet of Things Cloud Service.