Repository: home-assistant/core
Pull request: Support Body Composition Scale S400 in xiaomi_ble
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## Proposed change
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Add support for Xiaomi [Body Composition Scale S400](https://www.mi.com/global/product/xiaomi-body-composition-scale-s400/specs/) (MJTZC01YM), this fixes https://github.com/home-assistant/core/issues/142364.

Requires xiaomi-ble==0.37.0, dep bumping PR merged: https://github.com/home-assistant/core/pull/142812


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- This PR fixes or closes issue: fixes #142364
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Problem statement:
Can not integrate Xiaomi Body Composition Scale S400 (MJTZC01YM) over Xiaomi BLE
### The problem

It is not  possibme to integrate the Xiaomi Body Composition Scale S400 (MJTZC01YM) over Xiaomi BLE.
It seems only the old Xiaomi scales are working.

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

core-2025.3.4

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

core-2025.3.4

### What type of installation are you running?

Home Assistant OS

### Integration causing the issue

Home Assistant OS 14.2

### Link to integration documentation on our website

_No response_

### Diagnostics information

_No response_

### Example YAML snippet

```yaml

```

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

```txt

```

### Additional information

_No response_

Hints from issue discussion:
Hey there @jc2k, @ernst79, mind taking a look at this issue as it has been labeled with an integration (`xiaomi_ble`) you are listed as a [code owner](https://github.com/home-assistant/core/blob/dev/CODEOWNERS#L1751) for? Thanks!

<details>
<summary>Code owner commands</summary>


Code owners of `xiaomi_ble` can trigger bot actions by commenting:

- `@home-assistant close` Closes the issue.
- `@home-assistant rename Awesome new title` Renames the issue.
- `@home-assistant reopen` Reopen the issue.
- `@home-assistant unassign xiaomi_ble` Removes the current integration label and assignees on the issue, add the integration domain after the command.
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</details>


<sub><sup>(message by CodeOwnersMention)</sup></sub>

---

[xiaomi_ble documentation](https://www.home-assistant.io/integrations/xiaomi_ble)
[xiaomi_ble source](https://github.com/home-assistant/core/tree/dev/homeassistant/components/xiaomi_ble)
<sub><sup>(message by IssueLinks)</sup></sub>
This scale is not added in the pypi library https://github.com/Bluetooth-Devices/xiaomi-ble

You should first create an issue there and provide some BLE data, such that we can investigate it. 
Hi,

thank you - I have create a issue / feature request here: https://github.com/Bluetooth-Devices/xiaomi-ble/issues/158

BR

Commit message: Merge remote-tracking branch 'upstream/dev' into xiaomi_scale_s400

Patch to review:
diff --git a/homeassistant/components/xiaomi_ble/sensor.py b/homeassistant/components/xiaomi_ble/sensor.py
index 57dfaead2329b3..c79cd96e308516 100644
--- a/homeassistant/components/xiaomi_ble/sensor.py
+++ b/homeassistant/components/xiaomi_ble/sensor.py
@@ -177,6 +177,27 @@
         native_unit_of_measurement=UnitOfTime.MINUTES,
         state_class=SensorStateClass.MEASUREMENT,
     ),
+    # Low frequency impedance sensor (ohm)
+    (ExtendedSensorDeviceClass.IMPEDANCE_LOW, Units.OHM): SensorEntityDescription(
+        key=str(ExtendedSensorDeviceClass.IMPEDANCE_LOW),
+        native_unit_of_measurement=Units.OHM,
+        state_class=SensorStateClass.MEASUREMENT,
+        icon="mdi:omega",
+    ),
+    # Heart rate sensor (bpm)
+    (ExtendedSensorDeviceClass.HEART_RATE, "bpm"): SensorEntityDescription(
+        key=str(ExtendedSensorDeviceClass.HEART_RATE),
+        native_unit_of_measurement="bpm",
+        state_class=SensorStateClass.MEASUREMENT,
+        icon="mdi:heart-pulse",
+    ),
+    # User profile ID sensor
+    (ExtendedSensorDeviceClass.PROFILE_ID, None): SensorEntityDescription(
+        key=str(ExtendedSensorDeviceClass.PROFILE_ID),
+        native_unit_of_measurement=None,
+        state_class=SensorStateClass.MEASUREMENT,
+        icon="mdi:identifier",
+    ),
 }
 
 


Code review comments:
diff_hunk: @@ -177,6 +177,27 @@
         native_unit_of_measurement=UnitOfTime.MINUTES,
         state_class=SensorStateClass.MEASUREMENT,
     ),
+    # Low frequency impedance sensor (ohm)
+    (ExtendedSensorDeviceClass.IMPEDANCE_LOW, Units.OHM): SensorEntityDescription(
+        key=str(ExtendedSensorDeviceClass.IMPEDANCE_LOW),
+        native_unit_of_measurement=Units.OHM,
+        state_class=SensorStateClass.MEASUREMENT,
+        icon="mdi:omega",
+    ),
+    # Heart rate sensor (bpm)
+    (ExtendedSensorDeviceClass.HEART_RATE, "bpm"): SensorEntityDescription(
+        key=str(ExtendedSensorDeviceClass.HEART_RATE),
+        native_unit_of_measurement="bpm",
+        state_class=SensorStateClass.MEASUREMENT,
+        icon="mdi:heart-pulse",
+    ),
+    # User profile ID sensor
+    (ExtendedSensorDeviceClass.PROFILE_ID, None): SensorEntityDescription(
+        key=str(ExtendedSensorDeviceClass.PROFILE_ID),
+        native_unit_of_measurement=None,
path: homeassistant/components/xiaomi_ble/sensor.py
text: @user1:
I think you can leave out native_unit_of_measurement and state_class, just like for LOCK_METHOD.