az iot --help Manage Internet of Things (IoT) assets.

addaxnasom

Group
    az iot : Manage Internet of Things (IoT) assets.
        Comprehensive IoT data-plane functionality is available in the Azure IoT CLI Extension. For
        more info and install guide go to https://github.com/Azure/azure-iot-cli-extension.

Subgroups:
    dps : Manage Azure IoT Hub Device Provisioning Service.
    hub : Manage Azure IoT hubs.
    pnp : Manage IoT Plug and Play repositories and repository access keys.