Amazon-provided client device components
Amazon IoT Greengrass provides the following public components that you can deploy to core devices. These components enable client devices to connect and communicate with a core device.
Note
Several Amazon-provided components depend on specific minor versions of the Greengrass nucleus. Because of this dependency, you need to update these components when you update the Greengrass nucleus to a new minor version. For information about the specific versions of the nucleus that each component depends on, see the corresponding component topic. For more information about updating the nucleus, see Update the Amazon IoT Greengrass Core software (OTA).
When a component has a component type of both generic and Lambda, the current version of the component is the generic type and a previous version of the component is the Lambda type.
| Component | Description | Component type | Supported OS | Open source |
|---|---|---|---|---|
| Client device auth | Enables local IoT devices, called client devices, to connect to the core device. | Plugin | Linux, Windows | Yes |
| IP detector | Reports MQTT broker connectivity information to Amazon IoT Greengrass, so client devices can discover how to connect. | Plugin | Linux, Windows | Yes |
| MQTT bridge | Relays MQTT messages between client devices, local Amazon IoT Greengrass publish/subscribe, and Amazon IoT Core. | Plugin | Linux, Windows | Yes |
| MQTT 3.1.1 broker (Moquette) | Runs an MQTT 3.1.1 broker that handles messages between client devices and the core device. | Plugin | Linux, Windows | Yes |
| MQTT 5 broker (EMQX) | Runs an MQTT 5 broker that handles messages between client devices and the core device. | Generic | Linux, Windows | No |
| Shadow manager | Enables interaction with shadows on the core device. It manages shadow document storage and also the synchronization of local shadow states with the Amazon IoT Device Shadow service. | Plugin | Linux, Windows | Yes |