diff --git a/pyhap/accessory.py b/pyhap/accessory.py
index 6dc97309..f8a95f57 100644
--- a/pyhap/accessory.py
+++ b/pyhap/accessory.py
@@ -222,7 +222,7 @@ def get_characteristic(self, aid: int, iid: int) -> Optional["Characteristic"]:
 
         return self.iid_manager.get_obj(iid)
 
-    def to_HAP(self) -> Dict[str, Any]:
+    def to_HAP(self, include_value: bool = True) -> Dict[str, Any]:
         """A HAP representation of this Accessory.
 
         :return: A HAP representation of this accessory. For example:
@@ -241,7 +241,7 @@ def to_HAP(self) -> Dict[str, Any]:
         """
         return {
             HAP_REPR_AID: self.aid,
-            HAP_REPR_SERVICES: [s.to_HAP() for s in self.services],
+            HAP_REPR_SERVICES: [s.to_HAP(include_value=include_value) for s in self.services],
         }
 
     def setup_message(self):
@@ -386,12 +386,12 @@ def add_accessory(self, acc: "Accessory") -> None:
 
         self.accessories[acc.aid] = acc
 
-    def to_HAP(self) -> List[Dict[str, Any]]:
+    def to_HAP(self, include_value: bool = True) -> List[Dict[str, Any]]:
         """Returns a HAP representation of itself and all contained accessories.
 
         .. seealso:: Accessory.to_HAP
         """
-        return [acc.to_HAP() for acc in (super(), *self.accessories.values())]
+        return [acc.to_HAP(include_value=include_value) for acc in (super(), *self.accessories.values())]
 
     def get_characteristic(self, aid: int, iid: int) -> Optional["Characteristic"]:
         """.. seealso:: Accessory.to_HAP"""
diff --git a/pyhap/accessory_driver.py b/pyhap/accessory_driver.py
index c767f590..952eb43e 100644
--- a/pyhap/accessory_driver.py
+++ b/pyhap/accessory_driver.py
@@ -746,10 +746,10 @@ def setup_srp_verifier(self):
     def accessories_hash(self):
         """Hash the get_accessories response to track configuration changes."""
         return hashlib.sha512(
-            util.to_sorted_hap_json(self.get_accessories())
+            util.to_sorted_hap_json(self.get_accessories(include_value=False))
         ).hexdigest()
 
-    def get_accessories(self):
+    def get_accessories(self, include_value: bool = True):
         """Returns the accessory in HAP format.
 
         :return: An example HAP representation is:
@@ -774,7 +774,7 @@ def get_accessories(self):
 
         :rtype: dict
         """
-        hap_rep = self.accessory.to_HAP()
+        hap_rep = self.accessory.to_HAP(include_value=include_value)
         if not isinstance(hap_rep, list):
             hap_rep = [
                 hap_rep,
diff --git a/pyhap/characteristic.py b/pyhap/characteristic.py
index 0571e10a..5a361fd9 100644
--- a/pyhap/characteristic.py
+++ b/pyhap/characteristic.py
@@ -136,6 +136,7 @@ class Characteristic:
         "_loader_display_name",
         "allow_invalid_client_values",
         "unique_id",
+        "_to_hap_cache_with_value",
         "_to_hap_cache",
         "_always_null",
     )
@@ -183,6 +184,7 @@ def __init__(
         self.unique_id = unique_id
         self._uuid_str = uuid_to_hap_type(type_id)
         self._loader_display_name: Optional[str] = None
+        self._to_hap_cache_with_value: Optional[Dict[str, Any]] = None
         self._to_hap_cache: Optional[Dict[str, Any]] = None
 
     @property
@@ -194,7 +196,7 @@ def display_name(self) -> Optional[str]:
     def display_name(self, value: str) -> None:
         """Set the display name of the characteristic."""
         self._display_name = value
-        self._to_hap_cache = None
+        self._clear_cache()
 
     @property
     def value(self) -> Any:
@@ -205,7 +207,7 @@ def value(self) -> Any:
     def value(self, value: Any) -> None:
         """Set the value of the characteristic."""
         self._value = value
-        self._to_hap_cache = None
+        self._clear_cache()
 
     @property
     def properties(self) -> Dict[str, Any]:
@@ -303,6 +305,8 @@ def override_properties(
         if not properties and not valid_values:
             raise ValueError("No properties or valid_values specified to override.")
 
+        self._clear_cache()
+
         if properties:
             _validate_properties(properties)
             self._properties.update(properties)
@@ -310,8 +314,6 @@ def override_properties(
         if valid_values:
             self._properties[PROP_VALID_VALUES] = valid_values
 
-        self._to_hap_cache = None
-
         if self._always_null:
             self.value = None
             return
@@ -322,6 +324,11 @@ def override_properties(
         except ValueError:
             self.value = self._get_default_value()
 
+    def _clear_cache(self) -> None:
+        """Clear the cached HAP representation."""
+        self._to_hap_cache = None
+        self._to_hap_cache_with_value = None
+
     def set_value(self, value: Any, should_notify: bool = True) -> None:
         """Set the given raw value. It is checked if it is a valid value.
 
@@ -393,7 +400,7 @@ def notify(self, sender_client_addr: Optional[Tuple[str, int]] = None) -> None:
         self.broker.publish(self.value, self, sender_client_addr, immediate)
 
     # pylint: disable=invalid-name
-    def to_HAP(self) -> Dict[str, Any]:
+    def to_HAP(self, include_value: bool = True) -> Dict[str, Any]:
         """Create a HAP representation of this Characteristic.
 
         Used for json serialization.
@@ -401,8 +408,12 @@ def to_HAP(self) -> Dict[str, Any]:
         :return: A HAP representation.
         :rtype: dict
         """
-        if self._to_hap_cache is not None:
-            return self._to_hap_cache
+        if include_value:
+            if self._to_hap_cache_with_value is not None:
+                return self._to_hap_cache_with_value
+        else:
+            if self._to_hap_cache is not None:
+                return self._to_hap_cache
 
         properties = self._properties
         permissions = properties[PROP_PERMISSIONS]
@@ -435,10 +446,13 @@ def to_HAP(self) -> Dict[str, Any]:
             if max_length != DEFAULT_MAX_LENGTH:
                 hap_rep[HAP_REPR_MAX_LEN] = max_length
 
-        if HAP_PERMISSION_READ in permissions:
+        if include_value and HAP_PERMISSION_READ in permissions:
             hap_rep[HAP_REPR_VALUE] = self.get_value()
 
-        self._to_hap_cache = hap_rep
+        if include_value:
+            self._to_hap_cache_with_value = hap_rep
+        else:
+            self._to_hap_cache = hap_rep
         return hap_rep
 
     @classmethod
diff --git a/pyhap/service.py b/pyhap/service.py
index 1579809c..e31b3920 100644
--- a/pyhap/service.py
+++ b/pyhap/service.py
@@ -117,7 +117,7 @@ def configure_char(
         return char
 
     # pylint: disable=invalid-name
-    def to_HAP(self) -> Dict[str, Any]:
+    def to_HAP(self, include_value: bool = True) -> Dict[str, Any]:
         """Create a HAP representation of this Service.
 
         :return: A HAP representation.
@@ -126,7 +126,7 @@ def to_HAP(self) -> Dict[str, Any]:
         hap = {
             HAP_REPR_IID: self.broker.iid_manager.get_iid(self),
             HAP_REPR_TYPE: self._uuid_str,
-            HAP_REPR_CHARS: [c.to_HAP() for c in self.characteristics],
+            HAP_REPR_CHARS: [c.to_HAP(include_value) for c in self.characteristics],
         }
 
         if self.is_primary_service is not None:
diff --git a/tests/test_characteristic.py b/tests/test_characteristic.py
index abafa8b1..d952b72f 100644
--- a/tests/test_characteristic.py
+++ b/tests/test_characteristic.py
@@ -476,13 +476,13 @@ def test_to_HAP_bool():
     # pylint: disable=protected-access
     char = get_char(PROPERTIES.copy())
     char.properties["Format"] = "bool"
-    char._to_hap_cache = None
+    char._clear_cache()
     with patch.object(char, "broker"):
         hap_repr = char.to_HAP()
     assert hap_repr["format"] == "bool"
 
     char.properties["Permissions"] = []
-    char._to_hap_cache = None
+    char._clear_cache()
     with patch.object(char, "broker"):
         hap_repr = char.to_HAP()
     assert "value" not in hap_repr