diff --git a/revpipyload/mqttserver.py b/revpipyload/mqttserver.py
index e91ef5e..4924943 100644
--- a/revpipyload/mqttserver.py
+++ b/revpipyload/mqttserver.py
@@ -167,9 +167,12 @@ class MqttServer(Thread):
         # CoreIOs prüfen und zu export hinzufügen
         lst_coreio = []
         if self._rpi.core:
-            for obj_name in self._rpi.core.__slots__:
+            for obj_name in dir(self._rpi.core):
+                # Scan all non-private objects of the core device
+                if obj_name.find("_") == 0:
+                    continue
                 obj = getattr(self._rpi.core, obj_name)
-                if isinstance(obj, revpimodio2.io.IOBase):
+                if isinstance(obj, revpimodio2.io.IOBase) and obj.export:
                     lst_coreio.append(obj)
 
         # IOs exportieren und Events anmelden
diff --git a/setup.py b/setup.py
index e5772b3..49e9028 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@ setup(
 
     license="LGPLv3",
     name="revpipyload",
-    version="0.9.7",
+    version="0.9.7a",
 
     scripts=[
         "data/revpipyload",