2026.6.3
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Sync time

Use this action to synchronize the time of your Home Assistant instance to your BSB-LAN device. The device time is only updated when it differs from the Home Assistant time.

This is handy in automations, for example to keep the device clock accurate by syncing it once a day.

Using this action from the user interface

If you prefer building automations and scripts visually, Home Assistant walks you through this action step by step. You pick what to target, tweak a few options, and save. No YAML knowledge required.

To synchronize the time from an automation or a script:

  1. Go to Settings > Automations & scenes.
  2. Open an existing automation or script, or select Create automation > Create new automation.
  3. If you’re setting up a new automation, add a trigger in the When section. Scripts don’t need a trigger. They run when something else calls them.
  4. In the Then do section, select Add action.
  5. From the search box, search for and select BSB-LAN: Sync time.
  6. Select the Device to synchronize.
  7. Select Save.

Options in the UI

Device (Required)

The BSB-LAN device to synchronize the time for.

Using this action in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, refer to this action as bsblan.sync_time. A basic example looks like this:

ActionActions are used in several places in Home Assistant. As part of a script or automation, actions define what is going to happen once a trigger is activated. In scripts, an action is called *sequence*. [Learn more] 
action: bsblan.sync_time
data:
  device_id: a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4

This synchronizes the time of the selected BSB-LAN device.

Options in YAML

device_id string Required

The BSB-LAN device to synchronize the time for.

Good to know

  • The device time is only updated when it differs from the Home Assistant time.

Try it yourself

Ready to test this? Open Developer tools > Actions, search for this action, fill in the fields, and select Perform action. You see what happens on your actual entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more] without writing a line of YAML.

More examples

Real scenarios where this action shows up in automations and scripts. Copy any example and adapt it to your setup.

Tip

You don’t need to edit YAML to use these examples. Copy a YAML snippet from this page, open the automation editor in Home Assistant, and press Ctrl+V (or Cmd+V on Mac). Home Assistant automatically converts the pasted YAML into the visual editor format, whether it’s a full automation, a single trigger, a condition, or an action.

Synchronize the time daily

This automation synchronizes the BSB-LAN device time every day at 3:00.

YAML example for a daily time sync
AutomationAutomations in Home Assistant allow you to automatically respond to things that happen in and around your home. [Learn more] 
alias: "Sync BSB-LAN time daily"
triggers:
  - trigger: time
    at: "03:00:00"
actions:
  - action: bsblan.sync_time
    data:
      device_id: a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the action you’re calling and what you expected to happen, or share on our subreddit /r/homeassistant.

Tip

AI assistants like ChatGPT or Claude can also explain actions or suggest the right one when you describe what you want in plain language.

Related actions

These actions work well alongside this one: