diff --git a/examples/knx-esp-demo/knx-esp-demo.ino b/examples/knx-esp-demo/knx-esp-demo.ino
index 20de32f..b7ae38c 100644
--- a/examples/knx-esp-demo/knx-esp-demo.ino
+++ b/examples/knx-esp-demo/knx-esp-demo.ino
@@ -34,18 +34,18 @@ void measureTemp()
     currentValue *= 100 * 100;
 
     // write new value to groupobject
-    goCurrent.objectWriteFloat(currentValue);
+    goCurrent.objectWriteFloatDpt9(currentValue);
 
     if (currentValue > maxValue)
     {
         maxValue = currentValue;
-        goMax.objectWriteFloat(maxValue);
+        goMax.objectWriteFloatDpt9(maxValue);
     }
 
     if (currentValue < minValue)
     {
         minValue = currentValue;
-        goMin.objectWriteFloat(minValue);
+        goMin.objectWriteFloatDpt9(minValue);
     }
 }
 
diff --git a/src/esp_platform.cpp b/src/esp_platform.cpp
index 0e14a56..017ff11 100644
--- a/src/esp_platform.cpp
+++ b/src/esp_platform.cpp
@@ -76,7 +76,7 @@ void EspPlatform::closeMultiCast()
 
 bool EspPlatform::sendBytes(uint8_t * buffer, uint16_t len)
 {
-    printHex("<- ",buffer, len);
+    //printHex("<- ",buffer, len);
     int result = 0;
     result = _udp.beginPacketMulticast(_mulitcastAddr, _mulitcastPort, WiFi.localIP());
     result = _udp.write(buffer, len);
@@ -97,7 +97,7 @@ int EspPlatform::readBytes(uint8_t * buffer, uint16_t maxLen)
     }
 
     _udp.read(buffer, len);
-    printHex("-> ", buffer, len);
+    //printHex("-> ", buffer, len);
     return len;
 }
 
diff --git a/src/knx b/src/knx
index f50f03a..fd2334a 160000
--- a/src/knx
+++ b/src/knx
@@ -1 +1 @@
-Subproject commit f50f03ad6edaa73c6bc41496de696e1d7306b30b
+Subproject commit fd2334a4af59e9cea5325d399afc639517a5d41a
diff --git a/src/knx_facade.cpp b/src/knx_facade.cpp
index 898f31f..0c4956a 100644
--- a/src/knx_facade.cpp
+++ b/src/knx_facade.cpp
@@ -9,6 +9,7 @@ KnxFacade knx;
 KnxFacade::KnxFacade() : _bau(_platform)
 {
     manufacturerId(0xfa);
+    _bau.addSaveRestore(this);
 }
 
 bool KnxFacade::enabled()
@@ -61,6 +62,11 @@ void KnxFacade::readMemory()
     _bau.readMemory();
 }
 
+void KnxFacade::writeMemory()
+{
+    _bau.writeMemory();
+}
+
 void KnxFacade::loop()
 {
     if (currentState)
@@ -108,7 +114,7 @@ void KnxFacade::start()
 
     pinMode(_buttonPin, INPUT);
     attachInterrupt(_buttonPin, buttonDown, FALLING);
-
+    
     switchToSate(noWifiState);
     checkStates();
     _ticker.attach_ms(100, doLed);
diff --git a/src/knx_facade.h b/src/knx_facade.h
index 435873c..19fb3bc 100644
--- a/src/knx_facade.h
+++ b/src/knx_facade.h
@@ -21,6 +21,7 @@ public:
     uint32_t buttonPin();
     void buttonPin(uint32_t value);
     void readMemory();
+    void writeMemory();
     void loop();
     void knxLoop();
     void registerGroupObjects(GroupObject* groupObjects, uint16_t count);