diff --git a/src/knx/bau_systemB.cpp b/src/knx/bau_systemB.cpp
index 8fee035..6438e2f 100644
--- a/src/knx/bau_systemB.cpp
+++ b/src/knx/bau_systemB.cpp
@@ -48,16 +48,16 @@ void BauSystemB::sendNextGroupTelegram()
         if (flag != ReadRequest && flag != WriteRequest)
             continue;
 
-        if(!go.communicationEnable() || ! go.transmitEnable())
+        if (!go.communicationEnable())
             continue;
 
-        if (flag == WriteRequest)
+        if (flag == WriteRequest && go.transmitEnable())
         {
             uint8_t* data = go.valueRef();
             _appLayer.groupValueWriteRequest(AckRequested, asap, go.priority(), NetworkLayerParameter, data,
                 go.sizeInTelegram());
         }
-        else
+        else if (flag == ReadRequest)
         {
             _appLayer.groupValueReadRequest(AckRequested, asap, go.priority(), NetworkLayerParameter);
         }
@@ -265,6 +265,10 @@ void BauSystemB::groupValueReadLocalConfirm(AckType ack, uint16_t asap, Priority
 void BauSystemB::groupValueReadIndication(uint16_t asap, Priority priority, HopCountType hopType)
 {
     GroupObject& go = _groupObjTable.get(asap);
+
+    if (!go.communicationEnable() || !go.readEnable())
+        return;
+    
     uint8_t* data = go.valueRef();
     _appLayer.groupValueReadResponse(AckRequested, asap, priority, hopType, data, go.sizeInTelegram());
 }
diff --git a/src/knx/table_object.h b/src/knx/table_object.h
index 1a35395..d30fb70 100644
--- a/src/knx/table_object.h
+++ b/src/knx/table_object.h
@@ -29,7 +29,7 @@ public:
     virtual uint8_t* restore(uint8_t* buffer);
 protected:
     /**
-     * This method is called before the interface object enters a new ::Loadstate.
+     * This method is called before the interface object enters a new ::LoadState.
      * If there is a error changing the state newState should be set to ::LS_ERROR and errorCode() 
      * to a reason for the failure.
      */
diff --git a/src/knx_facade.h b/src/knx_facade.h
index c8b79c9..46515c9 100644
--- a/src/knx_facade.h
+++ b/src/knx_facade.h
@@ -30,11 +30,10 @@ public:
      * returns HIGH if led is active on HIGH, LOW otherwise
      */
     uint32_t ledPinActiveOn();
-	/**
-     * To adapt the output to hardware.
-	 *
-	 * @param ledPinActiveOn = "0" or "low"  --> GPIO--LED--RESISTOR--VDD (for example NODE MCU)
-	 * @param ledPinActiveOn = "1" or "high" --> GPIO--RESISTOR--LED--GND (for example WeMos D1 R2)
+    /**
+     * Sets if the programming led is active on HIGH or LOW. 
+     * 
+     * Set to HIGH for GPIO--RESISTOR--LED--GND or to LOW for GPIO--LED--RESISTOR--VDD
      */
     void ledPinActiveOn(uint32_t value);
     uint32_t ledPin();
@@ -63,9 +62,6 @@ private:
 	uint32_t _ledPinActiveOn = LOW;
     uint32_t _ledPin = LED_BUILTIN;
     uint32_t _buttonPin = 0;
-#ifdef USE_STATES
-    Ticker _ticker;
-#endif
     saveRestoreCallback _saveCallback = 0;
     saveRestoreCallback _restoreCallback = 0;