Fixed error-code returned when an object does not support WriteProperty but has properties that are known. (#912)

apps/piface/device.c

@@ -256,6 +256,35 @@ void Device_Objects_Property_List(
     return;
 }
 
+/**
+ * @brief Determine if the object property is a member of this object instance
+ * @param object_type - object type of the object
+ * @param object_instance - object-instance number of the object
+ * @param object_property - object-property to be checked
+ * @return true if the property is a member of this object instance
+ */
+bool Device_Objects_Property_List_Member(
+    BACNET_OBJECT_TYPE object_type,
+    uint32_t object_instance,
+    BACNET_PROPERTY_ID object_property)
+{
+    bool found = false;
+    struct special_property_list_t property_list = { 0 };
+
+    Device_Objects_Property_List(object_type, object_instance, &property_list);
+    found = property_list_member(property_list.Required.pList, object_property);
+    if (!found) {
+        found =
+            property_list_member(property_list.Optional.pList, object_property);
+    }
+    if (!found) {
+        found = property_list_member(
+            property_list.Proprietary.pList, object_property);
+    }
+
+    return found;
+}
+
 /* These three arrays are used by the ReadPropertyMultiple handler */
 static const int Device_Properties_Required[] = {
     PROP_OBJECT_IDENTIFIER,