diff --git a/src/knx/group_object.cpp b/src/knx/group_object.cpp
index cc5eaa31..6b9143db 100644
--- a/src/knx/group_object.cpp
+++ b/src/knx/group_object.cpp
@@ -224,13 +224,15 @@ 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;
 }
 
 
@@ -265,9 +267,9 @@ 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);
 }
 
 
@@ -277,19 +279,13 @@ 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);
 
@@ -305,7 +301,7 @@ bool GroupObject::valueNoSendCompare(const KNXValue& value, const Dpt& type)
     if (_commFlagEx.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 eb65ea3d..4d7823a4 100644
--- a/src/knx/group_object.h
+++ b/src/knx/group_object.h
@@ -171,8 +171,10 @@ 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.
@@ -182,18 +184,20 @@ 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 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 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.
@@ -203,7 +207,7 @@ 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);
 
@@ -229,15 +233,19 @@ 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
@@ -284,15 +292,4 @@ 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);
 };