Repository: home-assistant/core
Pull request: Add unique_id attribute to Alpha2Climate entity
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## Proposed change
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Add the unique_id attribute to Alpha2Climate entity

## Type of change
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- This PR fixes or closes issue: fixes #70601
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Problem statement:
integration: moehlenhoff_alpha2 unique_id area missing
### The problem

The entities created by the:"integration: moehlenhoff_alpha2" are missing an unique id, I cannot assign them to an area

### What version of Home Assistant Core has the issue?

Home Assistant 2022.4.6

### What was the last working version of Home Assistant Core?

_No response_

### What type of installation are you running?

Home Assistant OS

### Integration causing the issue

:"integration: moehlenhoff_alpha2" 

### Link to integration documentation on our website

_No response_

### Diagnostics information

_No response_

### Example YAML snippet

_No response_

### Anything in the logs that might be useful for us?

_No response_

### Additional information

_No response_

Hints from issue discussion:
Hey there @j-a-n, mind taking a look at this issue as it has been labeled with an integration (`moehlenhoff_alpha2`) you are listed as a [code owner](https://github.com/home-assistant/core/blob/dev/CODEOWNERS#L629) for? Thanks!
<sub><sup>(message by CodeOwnersMention)</sup></sub>

---

[moehlenhoff_alpha2 documentation](https://www.home-assistant.io/integrations/moehlenhoff_alpha2)
[moehlenhoff_alpha2 source](https://github.com/home-assistant/core/tree/dev/homeassistant/components/moehlenhoff_alpha2)
<sub><sup>(message by IssueLinks)</sup></sub>

Commit message: Use heat_area_id directly

Patch to review:
diff --git a/homeassistant/components/moehlenhoff_alpha2/climate.py b/homeassistant/components/moehlenhoff_alpha2/climate.py
index 71be199b622a5..9707591f74a01 100644
--- a/homeassistant/components/moehlenhoff_alpha2/climate.py
+++ b/homeassistant/components/moehlenhoff_alpha2/climate.py
@@ -50,6 +50,7 @@ def __init__(self, coordinator: Alpha2BaseCoordinator, heat_area_id: str) -> Non
         """Initialize Alpha2 ClimateEntity."""
         super().__init__(coordinator)
         self.heat_area_id = heat_area_id
+        self._attr_unique_id = f"{heat_area_id}:climate"
 
     @property
     def name(self) -> str:


Code review comments:
diff_hunk: @@ -50,6 +50,7 @@ def __init__(self, coordinator: Alpha2BaseCoordinator, heat_area_id: str) -> Non
         """Initialize Alpha2 ClimateEntity."""
         super().__init__(coordinator)
         self.heat_area_id = heat_area_id
+        self._attr_unique_id = f"{heat_area_id}:climate"
path: homeassistant/components/moehlenhoff_alpha2/climate.py
text: @user1:
No need to postfix this, as just the `heat_area_id` will already be unique within the climate platform for this integration.

```suggestion
        self._attr_unique_id = heat_area_id
```



@author:
The heat area ID consists of the serial number of the base and the number of the heat area. Separated by a colon.
e.g. `EZR012345:4`
So it is unique across multiple devices.
I added the suffix because I am planning to add the battery state of the heat area controller later on.
But if I understand you correctly, this is not needed because it only has to be unique within the climate platform?

@user1:
> The heat area ID consists of the serial number of the base and the number of the heat area. Separated by a colon. e.g. EZR012345:4 So it is unique across multiple devices.

Awesome 👍 

> I added the suffix because I am planning to add the battery state of the heat area controller later on.

That would be a sensor entity, which is a different platform. Unless you are planning on adding multiple climate entities per heat_area_id, the postfix isn't needed.