From e6750bb7467551758d8644d594184098a5456779 Mon Sep 17 00:00:00 2001
From: Li Shuzhen <SusanPhevos@users.noreply.github.com>
Date: Tue, 25 Nov 2025 09:31:40 +0800
Subject: [PATCH] feat: format value, then evaluate by expression, and set
 precision at last (#1516)

---
 .../xiaomi_home/miot/miot_device.py            | 15 +++++++++++----
 .../xiaomi_home/miot/miot_spec.py              | 18 ++++++++++++++----
 custom_components/xiaomi_home/sensor.py        |  2 +-
 3 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/custom_components/xiaomi_home/miot/miot_device.py b/custom_components/xiaomi_home/miot/miot_device.py
index a0e2edb..a585800 100644
--- a/custom_components/xiaomi_home/miot/miot_device.py
+++ b/custom_components/xiaomi_home/miot/miot_device.py
@@ -1041,6 +1041,7 @@ class MIoTServiceEntity(Entity):
                 f'set property failed, property is None, '
                 f'{self.entity_id}, {self.name}')
         value = prop.value_format(value)
+        value = prop.value_precision(value)
         if prop not in self.entity_data.props:
             raise RuntimeError(
                 f'set property failed, unknown property, '
@@ -1078,9 +1079,11 @@ class MIoTServiceEntity(Entity):
                 'get property failed, not readable, %s, %s, %s',
                 self.entity_id, self.name, prop.name)
             return None
-        result = prop.value_format(
+        value: Any = prop.value_format(
             await self.miot_device.miot_client.get_prop_async(
                 did=self.miot_device.did, siid=prop.service.iid, piid=prop.iid))
+        value = prop.eval_expr(value)
+        result = prop.value_precision(value)
         if result != self._prop_value_map[prop]:
             self._prop_value_map[prop] = result
             self.async_write_ha_state()
@@ -1111,7 +1114,7 @@ class MIoTServiceEntity(Entity):
                 continue
             value: Any = prop.value_format(params['value'])
             value = prop.eval_expr(value)
-            value = prop.value_format(value)
+            value = prop.value_precision(value)
             self._prop_value_map[prop] = value
             if prop in self._prop_changed_subs:
                 self._prop_changed_subs[prop](prop, value)
@@ -1259,6 +1262,7 @@ class MIoTPropertyEntity(Entity):
                 f'set property failed, not writable, '
                 f'{self.entity_id}, {self.name}')
         value = self.spec.value_format(value)
+        value = self.spec.value_precision(value)
         try:
             await self.miot_device.miot_client.set_prop_async(
                 did=self.miot_device.did, siid=self.spec.service.iid,
@@ -1276,16 +1280,19 @@ class MIoTPropertyEntity(Entity):
                 'get property failed, not readable, %s, %s',
                 self.entity_id, self.name)
             return None
-        return self.spec.value_format(
+        value: Any = self.spec.value_format(
             await self.miot_device.miot_client.get_prop_async(
                 did=self.miot_device.did, siid=self.spec.service.iid,
                 piid=self.spec.iid))
+        value = self.spec.eval_expr(value)
+        result = self.spec.value_precision(value)
+        return result
 
     def __on_value_changed(self, params: dict, ctx: Any) -> None:
         _LOGGER.debug('property changed, %s', params)
         value: Any = self.spec.value_format(params['value'])
         value = self.spec.eval_expr(value)
-        self._value = self.spec.value_format(value)
+        self._value = self.spec.value_precision(value)
         if not self._pending_write_ha_state_timer:
             self.async_write_ha_state()
 
diff --git a/custom_components/xiaomi_home/miot/miot_spec.py b/custom_components/xiaomi_home/miot/miot_spec.py
index cd61887..0f7da5e 100644
--- a/custom_components/xiaomi_home/miot/miot_spec.py
+++ b/custom_components/xiaomi_home/miot/miot_spec.py
@@ -599,15 +599,25 @@ class MIoTSpecProperty(_MIoTSpecBase):
     def value_format(self, value: Any) -> Any:
         if value is None:
             return None
+        if isinstance(value, str):
+            if self.format_ == int:
+                value = int(float(value))
+            elif self.format_ == float:
+                value = float(value)
+        if self.format_ == bool:
+            return bool(value in [True, 1, 'True', 'true', '1'])
+        return value
+
+    def value_precision(self, value: Any) -> Any:
+        if value is None:
+            return None
+        if self.format_ == float:
+            return round(value, self.precision)
         if self.format_ == int:
             if self.value_range is None:
                 return int(round(value))
             return int(
                 round(value / self.value_range.step) * self.value_range.step)
-        if self.format_ == float:
-            return round(value, self.precision)
-        if self.format_ == bool:
-            return bool(value in [True, 1, 'True', 'true', '1'])
         return value
 
     def dump(self) -> dict:
diff --git a/custom_components/xiaomi_home/sensor.py b/custom_components/xiaomi_home/sensor.py
index 88cb063..02371c9 100644
--- a/custom_components/xiaomi_home/sensor.py
+++ b/custom_components/xiaomi_home/sensor.py
@@ -110,7 +110,7 @@ class Sensor(MIoTPropertyEntity, SensorEntity):
                 self._attr_native_unit_of_measurement = list(
                     unit_sets)[0] if unit_sets else None
             # Set suggested precision
-            if spec.format_ in {int, float} and spec.expr is None:
+            if spec.format_ == float:
                 self._attr_suggested_display_precision = spec.precision
             # Set state_class
             if spec.state_class: