Set room temperature

Use this action to set the temperatures for a room in the Mill app. You identify the room by its name and set any of the away, comfort, and sleep temperatures for it.

This is handy in automations, for example, to lower the comfort temperature of a room while you are away and raise it again before you get home.

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 a room temperature 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 Mill: Set room temperature.
6. Enter the Room name and set the temperatures you want to change.
7. Select Save.

This action does not support targets. In the UI, you are not prompted to choose an area, device, entity, or label.

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 mill.set_room_temperature. A basic example looks like this:

action: mill.set_room_temperature
data:
  room_name: "Kitchen"
  comfort_temp: 21

This sets the comfort temperature of the Kitchen room to 21 degrees.

Options in YAML

Good to know

• The room name must match a room configured in the Mill app.
• You only need to set the temperatures you want to change. Any temperature you leave empty stays as it is.

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.

Automation: lower the comfort temperature while away

When everyone leaves home, lower the comfort temperature of the living room to save energy.

• Trigger: Everyone leaves home
• Action: Mill: Set room temperature

alias: "Lower Mill living room temperature when away"
triggers:
  - trigger: state
    entity_id: zone.home
    to: "0"
actions:
  - action: mill.set_room_temperature
    data:
      room_name: "Living room"
      comfort_temp: 17

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.