MQTT Bridge EN

MQTT Bridge

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The integration can optionally mirror all device states to a local MQTT broker. This is useful for:

• Local automations in Node-RED or other MQTT-aware tools
• Cross-system integrations (e.g. another smart-home platform consuming Gardena data)
• Offline state caching independent of the Home Assistant entity registry

Note: The MQTT bridge does not eliminate the cloud dependency. Device commands are still forwarded through the Husqvarna API. The bridge provides a local event bus for consuming state updates and triggering commands from external systems.

Setup

1. Ensure the MQTT integration is configured in Home Assistant and connected to a broker.
2. Go to Settings → Devices & Services → Gardena Smart System → Configure.
3. Enable MQTT bridge and configure the topic prefix (default: gardena_smart_system).

The bridge starts publishing on the next coordinator update. If the MQTT integration loads after this integration (common on cold boot), the bridge will retry up to once every 5 minutes until MQTT becomes available — no HA restart required.

Outbound Topics

Topic	Direction	Description
{prefix}/{device_id}/state	Outbound	Full device state as JSON (retained)
{prefix}/{device_id}/availability	Outbound	online or offline (retained)

Inbound Commands

Publish a JSON payload to {prefix}/{device_id}/command:

{"action": "start_watering", "duration": 30, "service_id": "device-uuid:1"}

Action	Parameters	Description
start_watering	duration (minutes, default 60), service_id	Start valve watering
stop_watering	service_id	Stop valve
turn_on	duration (minutes, default 60), service_id	Turn on power socket
turn_off	service_id	Turn off power socket
park	service_id	Park mower until further notice
resume	service_id	Resume mower schedule

service_id identifies the specific service inside a device (e.g. one valve in a multi-valve irrigation control). For single-service devices, use the format the integration logs on startup.

Disabling the Bridge

Open the integration's options again and disable MQTT bridge. Retained state and availability topics remain on the broker until you manually clear them.

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See also: Configuration