diff --git a/dbus-node-red-grid-meter/grid_meter.py b/dbus-node-red-grid-meter/grid_meter.py
index ddc1fdb..4f965fc 100644
--- a/dbus-node-red-grid-meter/grid_meter.py
+++ b/dbus-node-red-grid-meter/grid_meter.py
@@ -142,10 +142,11 @@ class NodeRedGridMeter:
        logging.debug("---");
        
        # increment UpdateIndex - to show that new data is available
-       index = self._dbusservice['/UpdateIndex'] + 1  # increment index
-       if index > 255:   # maximum value of the index
-         index = 0       # overflow from 255 to 0
-       self._dbusservice['/UpdateIndex'] = index
+       if self._dbusservice['/Connected'] == 1 :
+         index = self._dbusservice['/UpdateIndex'] + 1  # increment index
+         if index > 255:   # maximum value of the index
+           index = 0       # overflow from 255 to 0
+         self._dbusservice['/UpdateIndex'] = index
 
        #update lastupdate vars
        self._lastUpdate = time.time()