Set target humidity

Use this action to set the target relative humidity on a Belkin WeMo (Holmes) Smart Humidifier.

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 set the target humidity 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. Select what you want to control. Under By target (see Targets), select the humidifier you want to control.
6. From the actions shown for that target, select Belkin WeMo: Set humidity.
7. Set Target humidity to the relative humidity you want.
8. Select Save.

Options in the UI

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 wemo.set_humidity. A basic example looks like this:

action: wemo.set_humidity
target:
  entity_id: fan.bedroom_humidifier
data:
  target_humidity: 55

This sets the target humidity of fan.bedroom_humidifier to 55%.

Options in YAML

Targets of the action

This action requires a target. The target is the object of the action. You can point the action at a single entityAn 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], a device, an area, a floor, or a label, and Home Assistant will run the action on every matching fan entity behind that target.

• Entity: one specific fan entity, such as fan.living_room.
• Device: every fan entity that belongs to a device.
• Area: every fan entity in a room or area.
• Floor: every fan entity on a floor.
• Label: every fan entity that shares a label.

You can also select different target types in one action. For example, you can add a specific entity and an area as targets in the same action to run the action on both of them at once.

Good to know

• The WeMo humidifier only supports the humidity settings 45, 50, 55, 60, and 100. Any other value you set is rounded down to the nearest supported setting.

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.

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.

Related actions

These actions work well alongside this one:

• Reset filter life: Resets the filter life of a WeMo humidifier to 100%.