diff --git a/src/knx/group_object.cpp b/src/knx/group_object.cpp
index cc62220..dcec322 100644
--- a/src/knx/group_object.cpp
+++ b/src/knx/group_object.cpp
@@ -242,13 +242,15 @@ GroupObjectUpdatedHandler GroupObject::callback()
 }
 #endif
 
-void GroupObject::value(const KNXValue& value, const Dpt& type)
+bool GroupObject::value(const KNXValue& value, const Dpt& type)
 {
-    if (_valueNoSend(value, type))
+    if (valueNoSend(value, type))
     {
         // write on successful conversion/setting value only
         objectWritten();
+        return true;
     }
+    return false;
 }
 
 
@@ -283,9 +285,9 @@ bool GroupObject::tryValue(KNXValue& value)
 }
 
 
-void GroupObject::value(const KNXValue& value)
+bool GroupObject::value(const KNXValue& value)
 {
-    this->value(value, _datapointType);
+    return this->value(value, _datapointType);
 }
 
 
@@ -295,19 +297,13 @@ KNXValue GroupObject::value()
 }
 
 
-void GroupObject::valueNoSend(const KNXValue& value)
+bool GroupObject::valueNoSend(const KNXValue& value)
 {
-    valueNoSend(value, _datapointType);
+    return valueNoSend(value, _datapointType);
 }
 #endif
 
-void GroupObject::valueNoSend(const KNXValue& value, const Dpt& type)
-{
-    // ignore actual updating TODO check replacing valueNoSend with _valueNoSend
-    _valueNoSend(value, type);
-}
-
-bool GroupObject::_valueNoSend(const KNXValue& value, const Dpt& type)
+bool GroupObject::valueNoSend(const KNXValue& value, const Dpt& type)
 {
     const bool encodingDone = KNX_Encode_Value(value, _data, _dataLength, type);
 
@@ -323,7 +319,7 @@ bool GroupObject::valueNoSendCompare(const KNXValue& value, const Dpt& type)
     if (_uninitialized)
     {
         // always set first value
-        return _valueNoSend(value, type);
+        return valueNoSend(value, type);
     }
     else
     {
diff --git a/src/knx/group_object.h b/src/knx/group_object.h
index 2f1da9b..10b9c11 100644
--- a/src/knx/group_object.h
+++ b/src/knx/group_object.h
@@ -162,8 +162,10 @@ class GroupObject
          * @param type the datapoint type used for the conversion.
          *
          * The parameters must fit the group object. Otherwise it will stay unchanged.
+         *
+         * @returns true if the value was converted successfully to the datapoint type and the group object was updated.
          */
-        void value(const KNXValue& value, const Dpt& type);
+        bool value(const KNXValue& value, const Dpt& type);
 
         /**
          * Check if the value (after conversion to dpt) will differ from current value of the group object and changes the state of the group object to ::WriteRequest if different.
@@ -173,18 +175,20 @@ class GroupObject
          *
          * The parameters must fit the group object. Otherwise it will stay unchanged.
          *
-         * @returns true if the value of the group object has changed
+         * @returns true if the value of the group object has changed, false if conversion results in same value as stored in group object or failed.
          */
         bool valueCompare(const KNXValue& value, const Dpt& type);
 
         /**
-         * set the current value of the group object.
+         * set the current value of the group objectand show success.
          * @param value the value the group object is set to
          * @param type the datapoint type used for the conversion.
          *
          * The parameters must fit the group object. Otherwise it will stay unchanged.
+         *
+         * @returns true if value was converted successfully to the datapoint type and the group object was updated.
          */
-        void valueNoSend(const KNXValue& value, const Dpt& type);
+        bool valueNoSend(const KNXValue& value, const Dpt& type);
 
         /**
          * Check if the value (after conversion to dpt) will differ from current value of the group object and update if necessary.
@@ -194,7 +198,7 @@ class GroupObject
          *
          * The parameters must fit the group object. Otherwise it will stay unchanged.
          *
-         * @returns true if the value of the group object has changed
+         * @returns true if the value of the group object has changed, false if conversion results in same value as stored in group object or failed.
          */
         bool valueNoSendCompare(const KNXValue& value, const Dpt& type);
 
@@ -220,15 +224,19 @@ class GroupObject
          * @param value the value the group object is set to
          *
          * The parameters must fit the group object and dhe datapoint type must be set with dataPointType(). Otherwise it will stay unchanged.
+         *
+         * @returns true if the value was converted successfully to the datapoint type and the group object was updated.
          */
-        void value(const KNXValue& value);
+        bool value(const KNXValue& value);
         /**
          * set the current value of the group object.
          * @param value the value the group object is set to
          *
-         * The parameters must fit the group object and dhe datapoint type must be set with dataPointType(). Otherwise it will stay unchanged.
+         * The parameters must fit the group object and the datapoint type must be set with dataPointType(). Otherwise it will stay unchanged.
+         *
+         * @returns true if the value was converted successfully to the datapoint type and the group object was updated.
          */
-        void valueNoSend(const KNXValue& value);
+        bool valueNoSend(const KNXValue& value);
         /**
          * set the current value of the group object.
          * @param value the value the group object is set to
@@ -276,15 +284,4 @@ class GroupObject
         GroupObjectUpdatedHandler _updateHandler;
         Dpt _datapointType;
 #endif
-
-        /**
-         * set the current value of the group object and show success.
-         * @param value the value the group object is set to
-         * @param type the datapoint type used for the conversion.
-         * 
-         * The parameters must fit the group object. Otherwise it will stay unchanged.
-         * 
-         * @returns true if the value of the group object was updated after successful conversion.
-         */
-        bool _valueNoSend(const KNXValue& value, const Dpt& type);
 };