Assuming you have already connected a gateway with gatewayId: gateway-001 in namespace: com.mycompany.example, you can now proceed with connecting a ZigBee edge device (dimmer) to the gateway.
Thing ID: com.mycompany.example:gateway-001:da:device:ZigBee:3
Once connected, the dimmer is represented by the following DA Functional Items:
da:device:ZigBee:3 – the actual Device Functional Item.
da:item:ZigBee:3:1:Identifier – identifies the specific physical device.
da:item:ZigBee:3:1:TransitionActuator – represents an actuator that can change one value to another with a transition period. This FI provides a $set.configuration/<property-name> operation.
See Set a new dimmer level value
da:item:ZigBee:3:1:ZigBeeFirmwareUpdate – provides options for firmware updates and information about the current firmware.