diff --git a/src/knx_facade.cpp b/src/knx_facade.cpp
index 1e93ce8..ee951fb 100644
--- a/src/knx_facade.cpp
+++ b/src/knx_facade.cpp
@@ -1,229 +1,234 @@
-#include "knx_facade.h"
-
-#include "knx/bits.h"
-
-#ifdef ARDUINO_ARCH_SAMD
-SamdPlatform platform;
-Bau07B0 bau(platform);
-#define ICACHE_RAM_ATTR
-#elif ARDUINO_ARCH_ESP8266
-EspPlatform platform;
-Bau57B0 bau(platform);
-#elif __linux__ //linux
-// noops on linux
-#define digitalWrite(a, b)
-#define pinMode(a, b)
-#define attachInterrupt(a, b, c)
-#endif
-
-bool _toogleProgMode = false;
-#ifndef __linux__
-KnxFacade knx(bau);
-ICACHE_RAM_ATTR  void buttonUp()
-{
-	_toogleProgMode = true;
-}
-#endif
-
-KnxFacade::KnxFacade(BauSystemB &bau) : _bau(bau)
-{
-    manufacturerId(0xfa);
-    _bau.addSaveRestore(this);
-}
-
-bool KnxFacade::enabled()
-{
-    return _bau.enabled();
-}
-
-void KnxFacade::enabled(bool value)
-{
-    _bau.enabled(true);
-}
-
-bool KnxFacade::progMode()
-{
-    return _bau.deviceObject().progMode();
-}
-
-void KnxFacade::progMode(bool value)
-{
-    if (value)
-    {
-        println("progmode on");
-        digitalWrite(knx.ledPin(), _ledPinActiveOn);
-    }
-    else
-    {
-        println("progmode off");
-        digitalWrite(knx.ledPin(), HIGH - _ledPinActiveOn);
-    }
-
-    _bau.deviceObject().progMode(value);
-}
-
-bool KnxFacade::configured()
-{
-    return _bau.configured();
-}
-
-uint32_t KnxFacade::ledPinActiveOn()
-{
-    return _ledPinActiveOn;
-}
-
-void KnxFacade::ledPinActiveOn(uint32_t value)
-{
-    _ledPinActiveOn = value;
-}
-
-uint32_t KnxFacade::ledPin()
-{
-    return _ledPin;
-}
-
-void KnxFacade::ledPin(uint32_t value)
-{
-    _ledPin = value;
-}
-
-uint32_t KnxFacade::buttonPin()
-{
-    return _buttonPin;
-}
-
-void KnxFacade::buttonPin(uint32_t value)
-{
-    _buttonPin = value;
-}
-
-void KnxFacade::readMemory()
-{
-    _bau.readMemory();
-}
-
-void KnxFacade::writeMemory()
-{
-    _bau.writeMemory();
-}
-
-void KnxFacade::loop()
-{
-	if(_toogleProgMode)
-	{
-		progMode(!progMode());
-		_toogleProgMode = false;
-	}
-    _bau.loop();
-}
-
-void KnxFacade::manufacturerId(uint16_t value)
-{
-    _bau.deviceObject().manufacturerId(value);
-}
-
-void KnxFacade::bauNumber(uint32_t value)
-{
-    _bau.deviceObject().bauNumber(value);
-}
-
-uint16_t KnxFacade::induvidualAddress()
-{
-    return _bau.deviceObject().induvidualAddress();
-}
-
-void KnxFacade::orderNumber(const char *value)
-{
-    _bau.deviceObject().orderNumber(value);
-}
-
-void KnxFacade::hardwareType(uint8_t *value)
-{
-    _bau.deviceObject().hardwareType(value);
-}
-
-void KnxFacade::version(uint16_t value)
-{
-    _bau.deviceObject().version(value);
-}
-
-void KnxFacade::start()
-{
-    pinMode(_ledPin, OUTPUT);
-    
-    digitalWrite(_ledPin, HIGH - _ledPinActiveOn);
-
-    pinMode(_buttonPin, INPUT_PULLUP);
-
-    attachInterrupt(_buttonPin, buttonUp, RISING);
-    enabled(true);
-}
-
-uint8_t *KnxFacade::paramData(uint32_t addr)
-{
-    if (!_bau.configured())
-        return nullptr;
-
-    return _bau.parameters().data(addr);
-}
-
-uint8_t KnxFacade::paramByte(uint32_t addr)
-{
-    if (!_bau.configured())
-        return 0;
-
-    return _bau.parameters().getByte(addr);
-}
-
-uint16_t KnxFacade::paramWord(uint32_t addr)
-{
-    if (!_bau.configured())
-        return 0;
-
-    return _bau.parameters().getWord(addr);
-}
-
-uint32_t KnxFacade::paramInt(uint32_t addr)
-{
-    if (!_bau.configured())
-        return 0;
-
-    return _bau.parameters().getInt(addr);
-}
-
-void KnxFacade::setSaveCallback(saveRestoreCallback func)
-{
-    _saveCallback = func;
-}
-
-void KnxFacade::setRestoreCallback(saveRestoreCallback func)
-{
-    _restoreCallback = func;
-}
-
-uint8_t *KnxFacade::save(uint8_t *buffer)
-{
-    if (_saveCallback != 0)
-        return _saveCallback(buffer);
-
-    return buffer;
-}
-
-uint8_t *KnxFacade::restore(uint8_t *buffer)
-{
-    if (_restoreCallback != 0)
-        return _restoreCallback(buffer);
-
-    return buffer;
-}
-
-GroupObject &KnxFacade::getGroupObject(uint16_t goNr)
-{
-    return _bau.groupObjectTable().get(goNr);
-}
-
-
-void KnxFacade::restart(uint16_t individualAddress)
-{
-    _bau.restartRequest(individualAddress);
-}
+#include "knx_facade.h"
+
+#include "knx/bits.h"
+
+#ifdef ARDUINO_ARCH_SAMD
+SamdPlatform platform;
+Bau07B0 bau(platform);
+#define ICACHE_RAM_ATTR
+#elif ARDUINO_ARCH_ESP8266
+EspPlatform platform;
+Bau57B0 bau(platform);
+#elif __linux__ //linux
+// noops on linux
+#define digitalWrite(a, b)
+#define pinMode(a, b)
+#define attachInterrupt(a, b, c)
+#endif
+
+bool _toogleProgMode = false;
+bool _progLedState = false;
+
+#ifndef __linux__
+KnxFacade knx(bau);
+ICACHE_RAM_ATTR  void buttonUp()
+{
+    _toogleProgMode = true;
+}
+#endif
+
+KnxFacade::KnxFacade(BauSystemB &bau) : _bau(bau)
+{
+    manufacturerId(0xfa);
+    _bau.addSaveRestore(this);
+}
+
+bool KnxFacade::enabled()
+{
+    return _bau.enabled();
+}
+
+void KnxFacade::enabled(bool value)
+{
+    _bau.enabled(true);
+}
+
+bool KnxFacade::progMode()
+{
+    return _bau.deviceObject().progMode();
+}
+
+void KnxFacade::progMode(bool value)
+{
+    _bau.deviceObject().progMode(value);
+}
+
+bool KnxFacade::configured()
+{
+    return _bau.configured();
+}
+
+uint32_t KnxFacade::ledPinActiveOn()
+{
+    return _ledPinActiveOn;
+}
+
+void KnxFacade::ledPinActiveOn(uint32_t value)
+{
+    _ledPinActiveOn = value;
+}
+
+uint32_t KnxFacade::ledPin()
+{
+    return _ledPin;
+}
+
+void KnxFacade::ledPin(uint32_t value)
+{
+    _ledPin = value;
+}
+
+uint32_t KnxFacade::buttonPin()
+{
+    return _buttonPin;
+}
+
+void KnxFacade::buttonPin(uint32_t value)
+{
+    _buttonPin = value;
+}
+
+void KnxFacade::readMemory()
+{
+    _bau.readMemory();
+}
+
+void KnxFacade::writeMemory()
+{
+    _bau.writeMemory();
+}
+
+void KnxFacade::loop()
+{
+    if (progMode() != _progLedState)
+    {
+        _progLedState = progMode();
+        if (_progLedState)
+        {
+            println("progmode on");
+            digitalWrite(knx.ledPin(), _ledPinActiveOn);
+        }
+        else
+        {
+            println("progmode off");
+            digitalWrite(knx.ledPin(), HIGH - _ledPinActiveOn);
+        }
+    }
+    if (_toogleProgMode)
+    {
+        progMode(!progMode());
+        _toogleProgMode = false;
+    }
+    _bau.loop();
+}
+
+void KnxFacade::manufacturerId(uint16_t value)
+{
+    _bau.deviceObject().manufacturerId(value);
+}
+
+void KnxFacade::bauNumber(uint32_t value)
+{
+    _bau.deviceObject().bauNumber(value);
+}
+
+uint16_t KnxFacade::induvidualAddress()
+{
+    return _bau.deviceObject().induvidualAddress();
+}
+
+void KnxFacade::orderNumber(const char *value)
+{
+    _bau.deviceObject().orderNumber(value);
+}
+
+void KnxFacade::hardwareType(uint8_t *value)
+{
+    _bau.deviceObject().hardwareType(value);
+}
+
+void KnxFacade::version(uint16_t value)
+{
+    _bau.deviceObject().version(value);
+}
+
+void KnxFacade::start()
+{
+    pinMode(_ledPin, OUTPUT);
+
+    digitalWrite(_ledPin, HIGH - _ledPinActiveOn);
+
+    pinMode(_buttonPin, INPUT_PULLUP);
+
+    attachInterrupt(_buttonPin, buttonUp, RISING);
+    enabled(true);
+}
+
+uint8_t *KnxFacade::paramData(uint32_t addr)
+{
+    if (!_bau.configured())
+        return nullptr;
+
+    return _bau.parameters().data(addr);
+}
+
+uint8_t KnxFacade::paramByte(uint32_t addr)
+{
+    if (!_bau.configured())
+        return 0;
+
+    return _bau.parameters().getByte(addr);
+}
+
+uint16_t KnxFacade::paramWord(uint32_t addr)
+{
+    if (!_bau.configured())
+        return 0;
+
+    return _bau.parameters().getWord(addr);
+}
+
+uint32_t KnxFacade::paramInt(uint32_t addr)
+{
+    if (!_bau.configured())
+        return 0;
+
+    return _bau.parameters().getInt(addr);
+}
+
+void KnxFacade::setSaveCallback(saveRestoreCallback func)
+{
+    _saveCallback = func;
+}
+
+void KnxFacade::setRestoreCallback(saveRestoreCallback func)
+{
+    _restoreCallback = func;
+}
+
+uint8_t *KnxFacade::save(uint8_t *buffer)
+{
+    if (_saveCallback != 0)
+        return _saveCallback(buffer);
+
+    return buffer;
+}
+
+uint8_t *KnxFacade::restore(uint8_t *buffer)
+{
+    if (_restoreCallback != 0)
+        return _restoreCallback(buffer);
+
+    return buffer;
+}
+
+GroupObject &KnxFacade::getGroupObject(uint16_t goNr)
+{
+    return _bau.groupObjectTable().get(goNr);
+}
+
+
+void KnxFacade::restart(uint16_t individualAddress)
+{
+    _bau.restartRequest(individualAddress);
+}