diff --git a/src/knx/address_table_object.h b/src/knx/address_table_object.h
index c589843..28ce2bc 100644
--- a/src/knx/address_table_object.h
+++ b/src/knx/address_table_object.h
@@ -9,18 +9,18 @@
  * See section 4.10 of @cite knx:3/5/1 for further details.
  * It implements realisation type 7 (see section 4.10.7 of @cite knx:3/5/1). 
  */
-class AddressTableObject: public TableObject
+class AddressTableObject : public TableObject
 {
-public:
+  public:
     /**
      * The contructor.
      * 
      * @param platform This parameter is only passed to the custructor of TableObject an not used by this class.
      */
     AddressTableObject(Platform& platform);
-    void readProperty(PropertyID id, uint32_t start, uint32_t& count, uint8_t *data);
-    uint8_t *save(uint8_t *buffer);
-    uint8_t *restore(uint8_t *buffer);
+    void readProperty(PropertyID id, uint32_t start, uint32_t& count, uint8_t* data);
+    uint8_t* save(uint8_t* buffer);
+    uint8_t* restore(uint8_t* buffer);
     /**
      * returns the number of group addresses of the object.
      */
@@ -49,10 +49,12 @@ public:
      * @return true if the address table contains the group address, false otherwise
      */
     bool contains(uint16_t groupAddress);
-protected:
+
+  protected:
     virtual void beforeStateChange(LoadState& newState);
     uint8_t propertyCount();
     PropertyDescription* propertyDescriptions();
-private:
-    uint16_t* _groupAddresses;
+
+  private:
+    uint16_t* _groupAddresses = 0;
 };
diff --git a/src/knx/apdu.h b/src/knx/apdu.h
index 6322579..4b9fcf2 100644
--- a/src/knx/apdu.h
+++ b/src/knx/apdu.h
@@ -48,6 +48,6 @@ class APDU
     APDU(uint8_t* data, CemiFrame& frame);
 
   private:
-    uint8_t* _data;
+    uint8_t* _data = 0;
     CemiFrame& _frame;
 };
\ No newline at end of file
diff --git a/src/knx/application_layer.h b/src/knx/application_layer.h
index 46311a4..7af7262 100644
--- a/src/knx/application_layer.h
+++ b/src/knx/application_layer.h
@@ -146,6 +146,6 @@ class ApplicationLayer
     uint16_t _savedAsapResponse;
     AssociationTableObject& _assocTable;
     BusAccessUnit& _bau;
-    TransportLayer* _transportLayer;
+    TransportLayer* _transportLayer = 0;
     int32_t _connectedTsap;
 };
diff --git a/src/knx/application_program_object.h b/src/knx/application_program_object.h
index 22d8b3a..e7ac83f 100644
--- a/src/knx/application_program_object.h
+++ b/src/knx/application_program_object.h
@@ -2,9 +2,9 @@
 
 #include "table_object.h"
 
-class ApplicationProgramObject: public TableObject
+class ApplicationProgramObject : public TableObject
 {
-public:
+  public:
     ApplicationProgramObject(Platform& platform);
     void readProperty(PropertyID id, uint32_t start, uint32_t& count, uint8_t* data);
     void writeProperty(PropertyID id, uint8_t start, uint8_t* data, uint8_t count);
@@ -15,9 +15,11 @@ public:
     uint32_t getInt(uint32_t addr);
     uint8_t* save(uint8_t* buffer);
     uint8_t* restore(uint8_t* buffer);
-protected:
+
+  protected:
     uint8_t propertyCount();
     PropertyDescription* propertyDescriptions();
-private:
-    uint8_t _programVersion[5];
+
+  private:
+    uint8_t _programVersion[5] = {0, 0, 0, 0, 0};
 };
\ No newline at end of file
diff --git a/src/knx/association_table_object.h b/src/knx/association_table_object.h
index 80a133d..0021046 100644
--- a/src/knx/association_table_object.h
+++ b/src/knx/association_table_object.h
@@ -2,9 +2,9 @@
 
 #include "table_object.h"
 
-class AssociationTableObject: public TableObject
+class AssociationTableObject : public TableObject
 {
-public:
+  public:
     AssociationTableObject(Platform& platform);
     void readProperty(PropertyID id, uint32_t start, uint32_t& count, uint8_t* data);
     uint16_t entryCount();
@@ -13,10 +13,12 @@ public:
     uint8_t* restore(uint8_t* buffer);
 
     int32_t translateAsap(uint16_t asap);
-protected:
+
+  protected:
     void beforeStateChange(LoadState& newState);
     uint8_t propertyCount();
     PropertyDescription* propertyDescriptions();
-private:
-    uint16_t* _tableData;
+
+  private:
+    uint16_t* _tableData = 0;
 };
\ No newline at end of file
diff --git a/src/knx/bau.h b/src/knx/bau.h
index 6753064..a6cbd8d 100644
--- a/src/knx/bau.h
+++ b/src/knx/bau.h
@@ -4,107 +4,107 @@
 
 class BusAccessUnit
 {
-public:
+  public:
     virtual void groupValueReadLocalConfirm(AckType ack, uint16_t asap, Priority priority, HopCountType hopType, bool status);
     virtual void groupValueReadIndication(uint16_t asap, Priority priority, HopCountType hopType);
     virtual void groupValueReadResponseConfirm(AckType ack, uint16_t asap, Priority priority, HopCountType hopTtype,
-        uint8_t* data, uint8_t dataLength, bool status);
+                                               uint8_t* data, uint8_t dataLength, bool status);
     virtual void groupValueReadAppLayerConfirm(uint16_t asap, Priority priority, HopCountType hopType,
-        uint8_t* data, uint8_t dataLength);
+                                               uint8_t* data, uint8_t dataLength);
     virtual void groupValueWriteLocalConfirm(AckType ack, uint16_t asap, Priority priority, HopCountType hopType,
-        uint8_t* data, uint8_t dataLength, bool status);
+                                             uint8_t* data, uint8_t dataLength, bool status);
     virtual void groupValueWriteIndication(uint16_t asap, Priority priority, HopCountType hopType,
-        uint8_t* data, uint8_t dataLength);
+                                           uint8_t* data, uint8_t dataLength);
     virtual void individualAddressWriteLocalConfirm(AckType ack, HopCountType hopType,
-        uint16_t newaddress, bool status);
+                                                    uint16_t newaddress, bool status);
     virtual void individualAddressWriteIndication(HopCountType hopType, uint16_t newaddress);
     virtual void individualAddressReadLocalConfirm(AckType ack, HopCountType hopType, bool status);
     virtual void individualAddressReadIndication(HopCountType hopType);
     virtual void individualAddressReadResponseConfirm(AckType ack, HopCountType hopType, bool status);
     virtual void individualAddressReadAppLayerConfirm(HopCountType hopType, uint16_t individualAddress);
     virtual void individualAddressSerialNumberReadLocalConfirm(AckType ack, HopCountType hopType,
-        uint8_t* serialNumber, bool status);
+                                                               uint8_t* serialNumber, bool status);
     virtual void individualAddressSerialNumberReadIndication(HopCountType hopType, uint8_t* serialNumber);
     virtual void individualAddressSerialNumberReadResponseConfirm(AckType ack, HopCountType hopType,
-        uint8_t* serialNumber, uint16_t domainAddress, bool status);
+                                                                  uint8_t* serialNumber, uint16_t domainAddress, bool status);
     virtual void individualAddressSerialNumberReadAppLayerConfirm(HopCountType hopType, uint8_t* serialNumber,
-        uint16_t individualAddress, uint16_t domainAddress);
+                                                                  uint16_t individualAddress, uint16_t domainAddress);
     virtual void individualAddressSerialNumberWriteLocalConfirm(AckType ack, HopCountType hopType, uint8_t* serialNumber,
-        uint16_t newaddress, bool status);
+                                                                uint16_t newaddress, bool status);
     virtual void individualAddressSerialNumberWriteIndication(HopCountType hopType, uint8_t* serialNumber, uint16_t newaddress);
     virtual void deviceDescriptorReadLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t descriptorType, bool status);
+                                                  uint8_t descriptorType, bool status);
     virtual void deviceDescriptorReadIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t descriptorType);
     virtual void deviceDescriptorReadResponseConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t descriptor_type, uint8_t* device_descriptor, bool status);
+                                                     uint8_t descriptor_type, uint8_t* device_descriptor, bool status);
     virtual void deviceDescriptorReadAppLayerConfirm(Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t descriptortype, uint8_t* deviceDescriptor);
+                                                     uint8_t descriptortype, uint8_t* deviceDescriptor);
     virtual void restartRequestLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, bool status);
     virtual void restartRequestIndication(Priority priority, HopCountType hopType, uint16_t asap);
     virtual void propertyValueReadLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t objectIndex, uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, bool status);
+                                               uint8_t objectIndex, uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, bool status);
     virtual void propertyValueReadIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t objectIndex,
-        uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex);
+                                             uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex);
     virtual void propertyValueReadResponseConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t objectIndex,
-        uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data, uint8_t length, bool status);
+                                                  uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data, uint8_t length, bool status);
     virtual void propertyValueReadAppLayerConfirm(Priority priority, HopCountType hopType, uint16_t asap, uint8_t objectIndex,
-        uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data, uint8_t length);
+                                                  uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data, uint8_t length);
     virtual void propertyValueWriteLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t objectIndex,
-        uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data, uint8_t length, bool status);
+                                                uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data, uint8_t length, bool status);
     virtual void propertyValueWriteIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t objectIndex,
-        uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data, uint8_t length);
+                                              uint8_t propertyId, uint8_t numberOfElements, uint16_t startIndex, uint8_t* data, uint8_t length);
     virtual void propertyDescriptionReadLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex, bool status);
+                                                     uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex, bool status);
     virtual void propertyDescriptionReadIndication(Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex);
+                                                   uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex);
     virtual void propertyDescriptionReadResponse(AckType ack, Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex, bool writeEnable, uint8_t type,
-        uint16_t maxNumberOfElements, uint8_t access);
+                                                 uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex, bool writeEnable, uint8_t type,
+                                                 uint16_t maxNumberOfElements, uint8_t access);
     virtual void propertyDescriptionReadResponseConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex, bool writeEnable, uint8_t type,
-        uint16_t maxNumberOfElements, uint8_t access, bool status);
+                                                        uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex, bool writeEnable, uint8_t type,
+                                                        uint16_t maxNumberOfElements, uint8_t access, bool status);
     virtual void propertyDescriptionReadAppLayerConfirm(Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex, bool writeEnable, uint8_t type,
-        uint16_t maxNumberOfElements, uint8_t access);
+                                                        uint8_t objectIndex, uint8_t propertyId, uint8_t propertyIndex, bool writeEnable, uint8_t type,
+                                                        uint16_t maxNumberOfElements, uint8_t access);
     virtual void memoryReadLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint16_t memoryAddress, bool status);
+                                        uint16_t memoryAddress, bool status);
     virtual void memoryReadIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t number, uint16_t memoryAddress);
     virtual void memoryReadResponseConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint16_t memoryAddress, uint8_t* data, bool status);
+                                           uint16_t memoryAddress, uint8_t* data, bool status);
     virtual void memoryReadAppLayerConfirm(Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint16_t memoryAddress, uint8_t* data);
+                                           uint16_t memoryAddress, uint8_t* data);
     virtual void memoryWriteLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint16_t memoryAddress, uint8_t* data, bool status);
+                                         uint16_t memoryAddress, uint8_t* data, bool status);
     virtual void memoryWriteIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint16_t memoryAddress, uint8_t* data);
+                                       uint16_t memoryAddress, uint8_t* data);
     virtual void userMemoryReadLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint32_t memoryAddress, bool status);
+                                            uint32_t memoryAddress, bool status);
     virtual void userMemoryReadIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint32_t memoryAddress);
+                                          uint32_t memoryAddress);
     virtual void userMemoryReadResponseConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint32_t memoryAddress, uint8_t* memoryData, bool status);
+                                               uint32_t memoryAddress, uint8_t* memoryData, bool status);
     virtual void userMemoryReadAppLayerConfirm(Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint32_t memoryAddress, uint8_t* memoryData);
+                                               uint32_t memoryAddress, uint8_t* memoryData);
     virtual void userMemoryWriteLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint32_t memoryAddress, uint8_t* memoryData, bool status);
+                                             uint32_t memoryAddress, uint8_t* memoryData, bool status);
     virtual void userMemoryWriteIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint32_t memoryAddress, uint8_t* memoryData);
+                                           uint32_t memoryAddress, uint8_t* memoryData);
     virtual void userManufacturerInfoLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, bool status);
     virtual void userManufacturerInfoIndication(Priority priority, HopCountType hopType, uint16_t asap);
     virtual void userManufacturerInfoResponseConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t* info, bool status);
+                                                     uint8_t* info, bool status);
     virtual void userManufacturerInfoAppLayerConfirm(Priority priority, HopCountType hopType, uint16_t asap,
-        uint8_t* info);
+                                                     uint8_t* info);
     virtual void authorizeLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint32_t key, bool status);
     virtual void authorizeIndication(Priority priority, HopCountType hopType, uint16_t asap, uint32_t key);
     virtual void authorizeResponseConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t level,
-        bool status);
+                                          bool status);
     virtual void authorizeAppLayerConfirm(Priority priority, HopCountType hopType, uint16_t asap, uint8_t level);
     virtual void keyWriteLocalConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t level,
-        uint32_t key, bool status);
+                                      uint32_t key, bool status);
     virtual void keyWriteIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t level,
-        uint32_t key);
+                                    uint32_t key);
     virtual void keyWriteResponseConfirm(AckType ack, Priority priority, HopCountType hopType, uint16_t asap, uint8_t level,
-        bool status);
+                                         bool status);
     virtual void keyWriteAppLayerConfirm(Priority priority, HopCountType hopType, uint16_t asap, uint8_t level);
 };
diff --git a/src/knx/bau07B0.cpp b/src/knx/bau07B0.cpp
index 6381b8e..435ba5e 100644
--- a/src/knx/bau07B0.cpp
+++ b/src/knx/bau07B0.cpp
@@ -2,37 +2,33 @@
 #include <string.h>
 #include <stdio.h>
 
-
 using namespace std;
 
-Bau07B0::Bau07B0(Platform& platform): BauSystemB(platform),
-    _dlLayer(_deviceObj, _addrTable, _netLayer, _platform)
+Bau07B0::Bau07B0(Platform& platform)
+    : BauSystemB(platform),
+      _dlLayer(_deviceObj, _addrTable, _netLayer, _platform)
 {
     _netLayer.dataLinkLayer(_dlLayer);
-
-    uint8_t descriptor[] = { 0x07, 0xb0 };
-    _descriptor[0] = descriptor[0];
-    _descriptor[1] = descriptor[1];
 }
 
 InterfaceObject* Bau07B0::getInterfaceObject(uint8_t idx)
 {
     switch (idx)
     {
-    case 0:
-        return &_deviceObj;
-    case 1:
-        return &_addrTable;
-    case 2:
-        return &_assocTable;
-    case 3:
-        return &_groupObjTable;
-    case 4:
-        return &_appProgram;
-    case 5: // would be app_program 2
-        return nullptr;
-    default:
-        return nullptr;
+        case 0:
+            return &_deviceObj;
+        case 1:
+            return &_addrTable;
+        case 2:
+            return &_assocTable;
+        case 3:
+            return &_groupObjTable;
+        case 4:
+            return &_appProgram;
+        case 5: // would be app_program 2
+            return nullptr;
+        default:
+            return nullptr;
     }
 }
 
diff --git a/src/knx/bau07B0.h b/src/knx/bau07B0.h
index 27588cd..84d8aba 100644
--- a/src/knx/bau07B0.h
+++ b/src/knx/bau07B0.h
@@ -3,15 +3,17 @@
 #include "bau_systemB.h"
 #include "tpuart_data_link_layer.h"
 
-class Bau07B0: public BauSystemB
+class Bau07B0 : public BauSystemB
 {
-public:
+  public:
     Bau07B0(Platform& platform);
-protected:
+
+  protected:
     InterfaceObject* getInterfaceObject(uint8_t idx);
     uint8_t* descriptor();
     DataLinkLayer& dataLinkLayer();
-private:
+
+  private:
     TpUartDataLinkLayer _dlLayer;
-    uint8_t _descriptor[2];
+    uint8_t _descriptor[2] = {0x07, 0xb0};
 };
\ No newline at end of file
diff --git a/src/knx/bau57B0.cpp b/src/knx/bau57B0.cpp
index c915959..c255934 100644
--- a/src/knx/bau57B0.cpp
+++ b/src/knx/bau57B0.cpp
@@ -4,38 +4,35 @@
 
 using namespace std;
 
-Bau57B0::Bau57B0(Platform& platform): BauSystemB(platform),
-    _ipParameters(_deviceObj, platform),
-    _dlLayer(_deviceObj, _addrTable, _ipParameters, _netLayer, _platform)
+Bau57B0::Bau57B0(Platform& platform)
+    : BauSystemB(platform),
+      _ipParameters(_deviceObj, platform),
+      _dlLayer(_deviceObj, _addrTable, _ipParameters, _netLayer, _platform)
 {
     _netLayer.dataLinkLayer(_dlLayer);
     _memory.addSaveRestore(&_ipParameters);
-
-    uint8_t descriptor[] = { 0x57, 0xb0 };
-    _descriptor[0] = descriptor[0];
-    _descriptor[1] = descriptor[1];
 }
 
 InterfaceObject* Bau57B0::getInterfaceObject(uint8_t idx)
 {
     switch (idx)
     {
-    case 0:
-        return &_deviceObj;
-    case 1:
-        return &_addrTable;
-    case 2:
-        return &_assocTable;
-    case 3:
-        return &_groupObjTable;
-    case 4:
-        return &_appProgram;
-    case 5: // would be app_program 2
-        return nullptr;
-    case 6:
-        return &_ipParameters;
-    default:
-        return nullptr;
+        case 0:
+            return &_deviceObj;
+        case 1:
+            return &_addrTable;
+        case 2:
+            return &_assocTable;
+        case 3:
+            return &_groupObjTable;
+        case 4:
+            return &_appProgram;
+        case 5: // would be app_program 2
+            return nullptr;
+        case 6:
+            return &_ipParameters;
+        default:
+            return nullptr;
     }
 }
 
diff --git a/src/knx/bau57B0.h b/src/knx/bau57B0.h
index 59bfb15..297f4aa 100644
--- a/src/knx/bau57B0.h
+++ b/src/knx/bau57B0.h
@@ -4,16 +4,18 @@
 #include "ip_parameter_object.h"
 #include "ip_data_link_layer.h"
 
-class Bau57B0: public BauSystemB
+class Bau57B0 : public BauSystemB
 {
-public:
+  public:
     Bau57B0(Platform& platform);
-protected:
+
+  protected:
     InterfaceObject* getInterfaceObject(uint8_t idx);
     uint8_t* descriptor();
     DataLinkLayer& dataLinkLayer();
-private:
+
+  private:
     IpParameterObject _ipParameters;
     IpDataLinkLayer _dlLayer;
-    uint8_t _descriptor[2];
+    uint8_t _descriptor[2] = {0x57, 0xb0};
 };
\ No newline at end of file
diff --git a/src/knx/bau_systemB.h b/src/knx/bau_systemB.h
index d701b74..91a0741 100644
--- a/src/knx/bau_systemB.h
+++ b/src/knx/bau_systemB.h
@@ -13,9 +13,9 @@
 #include "platform.h"
 #include "memory.h"
 
-class BauSystemB: protected BusAccessUnit
+class BauSystemB : protected BusAccessUnit
 {
-public:
+  public:
     BauSystemB(Platform& platform);
     virtual void loop();
     DeviceObject& deviceObject();
@@ -28,13 +28,14 @@ public:
     void writeMemory();
     void addSaveRestore(SaveRestore* obj);
     void restartRequest(uint16_t asap);
-protected:
+
+  protected:
     virtual DataLinkLayer& dataLinkLayer() = 0;
     virtual uint8_t* descriptor() = 0;
     void memoryWriteIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint16_t memoryAddress, uint8_t* data) override;
+                               uint16_t memoryAddress, uint8_t* data) override;
     void memoryReadIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t number,
-        uint16_t memoryAddress) override;
+                              uint16_t memoryAddress) override;
     void deviceDescriptorReadIndication(Priority priority, HopCountType hopType, uint16_t asap, uint8_t descriptorType) override;
     void restartRequestIndication(Priority priority, HopCountType hopType, uint16_t asap) override;
     void authorizeIndication(Priority priority, HopCountType hopType, uint16_t asap, uint32_t key) override;
@@ -58,7 +59,6 @@ protected:
     void groupValueWriteIndication(uint16_t asap, Priority priority, HopCountType hopType,
                                    uint8_t* data, uint8_t dataLength) override;
 
-    
     virtual InterfaceObject* getInterfaceObject(uint8_t idx) = 0;
     void sendNextGroupTelegram();
     void updateGroupObject(GroupObject& go, uint8_t* data, uint8_t length);
diff --git a/src/knx/cemi_frame.h b/src/knx/cemi_frame.h
index 8a2ed60..f8f69e6 100644
--- a/src/knx/cemi_frame.h
+++ b/src/knx/cemi_frame.h
@@ -15,18 +15,19 @@
 class CemiFrame
 {
     friend class DataLinkLayer;
-public:
+
+  public:
     CemiFrame(uint8_t* data, uint16_t length);
     CemiFrame(uint8_t apduLength);
     CemiFrame(const CemiFrame& other);
-    CemiFrame& operator= (CemiFrame other);
+    CemiFrame& operator=(CemiFrame other);
 
     MessageCode messageCode() const;
     void messageCode(MessageCode value);
     uint16_t totalLenght() const;
     uint16_t telegramLengthtTP() const;
     void fillTelegramTP(uint8_t* data);
-    
+
     FrameFormat frameType() const;
     void frameType(FrameFormat value);
     Repetition repetition() const;
@@ -49,15 +50,16 @@ public:
     NPDU& npdu();
     TPDU& tpdu();
     APDU& apdu();
-    
+
     uint8_t calcCRC(uint8_t* buffer, uint16_t len);
     bool valid() const;
-private:
-    uint8_t buffer[0xff + NPDU_LPDU_DIFF]; //only valid of add info is zero
-    uint8_t* _data;
-    uint8_t* _ctrl1;
+
+  private:
+    uint8_t buffer[0xff + NPDU_LPDU_DIFF] = {0}; //only valid of add info is zero
+    uint8_t* _data = 0;
+    uint8_t* _ctrl1 = 0;
     NPDU _npdu;
     TPDU _tpdu;
     APDU _apdu;
-    uint16_t _length; // only set if created from byte array
+    uint16_t _length = 0; // only set if created from byte array
 };
\ No newline at end of file
diff --git a/src/knx/data_link_layer.h b/src/knx/data_link_layer.h
index 74a3b50..c1bd908 100644
--- a/src/knx/data_link_layer.h
+++ b/src/knx/data_link_layer.h
@@ -8,21 +8,22 @@
 
 class DataLinkLayer
 {
-public:
-    DataLinkLayer(DeviceObject& devObj, AddressTableObject& addrTab, NetworkLayer& layer, 
-        Platform& platform);
+  public:
+    DataLinkLayer(DeviceObject& devObj, AddressTableObject& addrTab, NetworkLayer& layer,
+                  Platform& platform);
 
     // from network layer
-    void dataRequest(AckType ack, AddressType addrType, uint16_t destinationAddr, FrameFormat format, 
-        Priority priority, NPDU& npdu);
+    void dataRequest(AckType ack, AddressType addrType, uint16_t destinationAddr, FrameFormat format,
+                     Priority priority, NPDU& npdu);
     void systemBroadcastRequest(AckType ack, FrameFormat format, Priority priority, NPDU& npdu);
     virtual void loop() = 0;
     virtual void enabled(bool value) = 0;
     virtual bool enabled() const = 0;
-protected:
+
+  protected:
     void frameRecieved(CemiFrame& frame);
     void dataConReceived(CemiFrame& frame, bool success);
-    bool sendTelegram(NPDU &npdu, AckType ack, uint16_t destinationAddr, AddressType addrType, FrameFormat format, Priority priority);
+    bool sendTelegram(NPDU& npdu, AckType ack, uint16_t destinationAddr, AddressType addrType, FrameFormat format, Priority priority);
     virtual bool sendFrame(CemiFrame& frame) = 0;
     uint8_t* frameData(CemiFrame& frame);
     DeviceObject& _deviceObject;
diff --git a/src/knx/device_object.h b/src/knx/device_object.h
index dcc594c..6d66133 100644
--- a/src/knx/device_object.h
+++ b/src/knx/device_object.h
@@ -39,13 +39,13 @@ protected:
     uint8_t propertyCount();
     PropertyDescription* propertyDescriptions();
 private:
-    uint8_t _deviceControl;
-    uint8_t _routingCount;
-    uint8_t _prgMode;
-    uint16_t _ownAddress;
+    uint8_t _deviceControl = 0;
+    uint8_t _routingCount = 0;
+    uint8_t _prgMode = 0;
+    uint16_t _ownAddress = 0;
     uint16_t _manufacturerId = 0xfa; //Default to KNXA
-    uint32_t _bauNumber;
-    char _orderNumber[10];
-    uint8_t _hardwareType[6];
-    uint16_t _version;
+    uint32_t _bauNumber = 0;
+    char _orderNumber[10] = "";
+    uint8_t _hardwareType[6] = { 0, 0, 0, 0, 0, 0};
+    uint16_t _version = 0;
 };
\ No newline at end of file
diff --git a/src/knx/dptconvert.h b/src/knx/dptconvert.h
index 98d7192..37df062 100644
--- a/src/knx/dptconvert.h
+++ b/src/knx/dptconvert.h
@@ -36,110 +36,110 @@
 /**
  * Converts the KNX Payload given by the specific DPT and puts the value in the KNXValue struc
  */
-int KNX_Decode_Value(uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int KNX_Decode_Value(uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
 
 /**
  * Converts the KNXValue struct to the KNX Payload as the specific DPT
  */
-int KNX_Encode_Value(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
+int KNX_Encode_Value(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
 
 //KNX to internal
-int busValueToBinary(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToBinaryControl(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToStepControl(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToCharacter(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToUnsigned8(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToSigned8(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToStatusAndMode(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToUnsigned16(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToTimePeriod(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToSigned16(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToTimeDelta(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToFloat16(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToTime(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToDate(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToUnsigned32(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToSigned32(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToLongTimePeriod(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToFloat32(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToAccess(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToString(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToScene(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToSceneControl(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToSceneInfo(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToSceneConfig(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToDateTime(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToUnicode(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToSigned64(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToAlarmInfo(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToSerialNumber(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToVersion(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToScaling(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToTariff(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToLocale(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToRGB(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToFlaggedScaling(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
-int busValueToActiveEnergy(const uint8_t *payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToBinary(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToBinaryControl(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToStepControl(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToCharacter(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToUnsigned8(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToSigned8(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToStatusAndMode(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToUnsigned16(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToTimePeriod(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToSigned16(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToTimeDelta(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToFloat16(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToTime(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToDate(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToUnsigned32(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToSigned32(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToLongTimePeriod(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToFloat32(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToAccess(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToString(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToScene(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToSceneControl(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToSceneInfo(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToSceneConfig(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToDateTime(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToUnicode(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToSigned64(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToAlarmInfo(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToSerialNumber(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToVersion(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToScaling(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToTariff(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToLocale(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToRGB(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToFlaggedScaling(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
+int busValueToActiveEnergy(const uint8_t* payload, int payload_length, const Dpt& datatype, KNXValue& value);
 
 //Internal to KNX
-int valueToBusValueBinary(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueBinaryControl(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueStepControl(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueCharacter(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueUnsigned8(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueSigned8(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueStatusAndMode(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueUnsigned16(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueTimePeriod(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueSigned16(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueTimeDelta(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueFloat16(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueTime(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueDate(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueUnsigned32(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueSigned32(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueLongTimePeriod(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueFloat32(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueAccess(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueString(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueScene(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueSceneControl(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueSceneInfo(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueSceneConfig(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueDateTime(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueUnicode(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueSigned64(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueAlarmInfo(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueSerialNumber(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueVersion(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueScaling(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueTariff(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueLocale(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueRGB(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueFlaggedScaling(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
-int valueToBusValueActiveEnergy(const KNXValue& value, uint8_t *payload, int payload_length, const Dpt& datatype);
+int valueToBusValueBinary(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueBinaryControl(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueStepControl(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueCharacter(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueUnsigned8(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueSigned8(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueStatusAndMode(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueUnsigned16(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueTimePeriod(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueSigned16(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueTimeDelta(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueFloat16(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueTime(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueDate(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueUnsigned32(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueSigned32(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueLongTimePeriod(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueFloat32(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueAccess(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueString(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueScene(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueSceneControl(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueSceneInfo(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueSceneConfig(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueDateTime(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueUnicode(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueSigned64(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueAlarmInfo(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueSerialNumber(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueVersion(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueScaling(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueTariff(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueLocale(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueRGB(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueFlaggedScaling(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
+int valueToBusValueActiveEnergy(const KNXValue& value, uint8_t* payload, int payload_length, const Dpt& datatype);
 
 //Payload manipulation
-bool bitFromPayload(const uint8_t *payload, int index);
-uint8_t unsigned8FromPayload(const uint8_t *payload, int index);
-int8_t signed8FromPayload(const uint8_t *payload, int index);
-uint16_t unsigned16FromPayload(const uint8_t *payload, int index);
-int16_t signed16FromPayload(const uint8_t *payload, int index);
-uint32_t unsigned32FromPayload(const uint8_t *payload, int index);
-int32_t signed32FromPayload(const uint8_t *payload, int index);
-double float16FromPayload(const uint8_t *payload, int index);
-float float32FromPayload(const uint8_t *payload, int index);
-int64_t signed64FromPayload(const uint8_t *payload, int index);
-uint8_t bcdFromPayload(const uint8_t *payload, int index);
+bool bitFromPayload(const uint8_t* payload, int index);
+uint8_t unsigned8FromPayload(const uint8_t* payload, int index);
+int8_t signed8FromPayload(const uint8_t* payload, int index);
+uint16_t unsigned16FromPayload(const uint8_t* payload, int index);
+int16_t signed16FromPayload(const uint8_t* payload, int index);
+uint32_t unsigned32FromPayload(const uint8_t* payload, int index);
+int32_t signed32FromPayload(const uint8_t* payload, int index);
+double float16FromPayload(const uint8_t* payload, int index);
+float float32FromPayload(const uint8_t* payload, int index);
+int64_t signed64FromPayload(const uint8_t* payload, int index);
+uint8_t bcdFromPayload(const uint8_t* payload, int index);
 
-void bitToPayload(uint8_t *payload, int payload_length, int index, bool value);
-void unsigned8ToPayload(uint8_t *payload, int payload_length, int index, uint8_t value, uint8_t mask);    //mask 0xFF
-void signed8ToPayload(uint8_t *payload, int payload_length, int index, int8_t value, uint8_t mask);       //mask 0xFF
-void unsigned16ToPayload(uint8_t *payload, int payload_length, int index, uint16_t value, uint16_t mask); //mask 0xFFFF
-void signed16ToPayload(uint8_t *payload, int payload_length, int index, int16_t value, uint16_t mask);    //mask 0xFFFF
-void unsigned32ToPayload(uint8_t *payload, int payload_length, int index, uint32_t value, uint32_t mask); //mask = 0xFFFFFFFF
-void signed32ToPayload(uint8_t *payload, int payload_length, int index, int32_t value, uint32_t mask);    //mask  = 0xFFFFFFFF
-void float16ToPayload(uint8_t *payload, int payload_length, int index, double value, uint16_t mask);      //mask = 0xFFFF
-void float32ToPayload(uint8_t *payload, int payload_length, int index, double value, uint32_t mask);      //mask  = 0xFFFFFFFF
-void signed64ToPayload(uint8_t *payload, int payload_length, int index, int64_t value, uint64_t mask);    //mask = UINT64_C(0xFFFFFFFFFFFFFFFF)
-void bcdToPayload(uint8_t *payload, int payload_length, int index, uint8_t value);
\ No newline at end of file
+void bitToPayload(uint8_t* payload, int payload_length, int index, bool value);
+void unsigned8ToPayload(uint8_t* payload, int payload_length, int index, uint8_t value, uint8_t mask);    //mask 0xFF
+void signed8ToPayload(uint8_t* payload, int payload_length, int index, int8_t value, uint8_t mask);       //mask 0xFF
+void unsigned16ToPayload(uint8_t* payload, int payload_length, int index, uint16_t value, uint16_t mask); //mask 0xFFFF
+void signed16ToPayload(uint8_t* payload, int payload_length, int index, int16_t value, uint16_t mask);    //mask 0xFFFF
+void unsigned32ToPayload(uint8_t* payload, int payload_length, int index, uint32_t value, uint32_t mask); //mask = 0xFFFFFFFF
+void signed32ToPayload(uint8_t* payload, int payload_length, int index, int32_t value, uint32_t mask);    //mask  = 0xFFFFFFFF
+void float16ToPayload(uint8_t* payload, int payload_length, int index, double value, uint16_t mask);      //mask = 0xFFFF
+void float32ToPayload(uint8_t* payload, int payload_length, int index, double value, uint32_t mask);      //mask  = 0xFFFFFFFF
+void signed64ToPayload(uint8_t* payload, int payload_length, int index, int64_t value, uint64_t mask);    //mask = UINT64_C(0xFFFFFFFFFFFFFFFF)
+void bcdToPayload(uint8_t* payload, int payload_length, int index, uint8_t value);
\ No newline at end of file
diff --git a/src/knx/group_object.h b/src/knx/group_object.h
index 372d69e..0e71b96 100644
--- a/src/knx/group_object.h
+++ b/src/knx/group_object.h
@@ -9,7 +9,7 @@ class GroupObjectTableObject;
 
 enum ComFlag
 {
-    Updated = 0,       //!< Group object was updated
+    Updated = 0,      //!< Group object was updated
     ReadRequest = 1,  //!< Read was requested but was not processed
     WriteRequest = 2, //!< Write was requested but was not processed
     Transmitting = 3, //!< Group Object is processed a the moment (read or write)
@@ -19,12 +19,11 @@ enum ComFlag
 
 class GroupObject;
 
-
 #ifdef __linux__
 #include <functional>
 typedef std::function<void(GroupObject&)> GroupObjectUpdatedHandler;
 #else
-typedef void(*GroupObjectUpdatedHandler)(GroupObject& go);
+typedef void (*GroupObjectUpdatedHandler)(GroupObject& go);
 #endif
 
 /**
@@ -33,7 +32,8 @@ typedef void(*GroupObjectUpdatedHandler)(GroupObject& go);
 class GroupObject
 {
     friend class GroupObjectTableObject;
-public:
+
+  public:
     /**
      * The constructor.
      */
@@ -41,7 +41,7 @@ public:
     /**
      * The copy constructor.
      */
-    GroupObject(const GroupObject& other); 
+    GroupObject(const GroupObject& other);
     /**
      * The destructor.
      */
@@ -71,12 +71,12 @@ public:
      * Check if the communication flag (C) was set. (K-flag in german)
      */
     bool communicationEnable();
-    
+
     /**
      * Get the priority of the group object.
      */
     Priority priority();
-    
+
     /**
      * Return the current state of the group object. See ::ComFlag
      */
@@ -206,10 +206,10 @@ public:
     size_t asapValueSize(uint8_t code);
     GroupObjectUpdatedHandler _updateHandler;
     size_t goSize();
-    uint16_t _asap;
-    ComFlag _commFlag;
-    uint8_t* _data;
-    uint8_t _dataLength;
-    GroupObjectTableObject* _table;
+    uint16_t _asap = 0;
+    ComFlag _commFlag = Ok;
+    uint8_t* _data = 0;
+    uint8_t _dataLength = 0;
+    GroupObjectTableObject* _table = 0;
     Dpt _datapointType;
 };
diff --git a/src/knx/group_object_table_object.h b/src/knx/group_object_table_object.h
index 44d1057..bd9bdd3 100644
--- a/src/knx/group_object_table_object.h
+++ b/src/knx/group_object_table_object.h
@@ -3,11 +3,11 @@
 #include "table_object.h"
 #include "group_object.h"
 
-class GroupObjectTableObject: public TableObject
+class GroupObjectTableObject : public TableObject
 {
     friend class GroupObject;
 
-public:
+  public:
     GroupObjectTableObject(Platform& platform);
     virtual ~GroupObjectTableObject();
     void readProperty(PropertyID id, uint32_t start, uint32_t& count, uint8_t* data);
@@ -18,11 +18,13 @@ public:
 
     virtual uint8_t* save(uint8_t* buffer);
     virtual uint8_t* restore(uint8_t* buffer);
-protected:
+
+  protected:
     virtual void beforeStateChange(LoadState& newState);
     uint8_t propertyCount();
     PropertyDescription* propertyDescriptions();
-private:
+
+  private:
     void freeGroupObjects();
     bool initGroupObjects();
     uint16_t* _tableData = 0;
diff --git a/src/knx/interface_object.h b/src/knx/interface_object.h
index e1fcb72..1452eca 100644
--- a/src/knx/interface_object.h
+++ b/src/knx/interface_object.h
@@ -53,9 +53,9 @@ enum ObjectType
 /**
  * This class represents and interface object. See section 4 of @cite knx:3/4/1.
  */
-class InterfaceObject: public SaveRestore
+class InterfaceObject : public SaveRestore
 {
-public:
+  public:
     /**
      * Destructor
      */
@@ -112,9 +112,10 @@ public:
      * 
      * @param[out] access the ::AccessLevel necessary to read/write the property. 
      */
-    
+
     void readPropertyDescription(uint8_t& propertyId, uint8_t& propertyIndex, bool& writeEnable, uint8_t& type, uint16_t& numberOfElements, uint8_t& access);
-protected:
+
+  protected:
     /**
      * Returns the number of properties the interface object has.
      */
diff --git a/src/knx/ip_data_link_layer.h b/src/knx/ip_data_link_layer.h
index 4ad86af..ddb1baa 100644
--- a/src/knx/ip_data_link_layer.h
+++ b/src/knx/ip_data_link_layer.h
@@ -4,17 +4,19 @@
 #include "data_link_layer.h"
 #include "ip_parameter_object.h"
 
-class IpDataLinkLayer: public DataLinkLayer
+class IpDataLinkLayer : public DataLinkLayer
 {
     using DataLinkLayer::_deviceObject;
-public:
-    IpDataLinkLayer(DeviceObject& devObj, AddressTableObject& addrTab, IpParameterObject& ipParam, NetworkLayer& layer, 
-        Platform& platform);
+
+  public:
+    IpDataLinkLayer(DeviceObject& devObj, AddressTableObject& addrTab, IpParameterObject& ipParam, NetworkLayer& layer,
+                    Platform& platform);
 
     void loop();
     void enabled(bool value);
     bool enabled() const;
-private:
+
+  private:
     bool _enabled = false;
     bool sendFrame(CemiFrame& frame);
     bool sendBytes(uint8_t* buffer, uint16_t length);
diff --git a/src/knx/ip_parameter_object.h b/src/knx/ip_parameter_object.h
index efd272b..4b23e34 100644
--- a/src/knx/ip_parameter_object.h
+++ b/src/knx/ip_parameter_object.h
@@ -4,9 +4,9 @@
 #include "device_object.h"
 #include "platform.h"
 
-class IpParameterObject: public InterfaceObject
+class IpParameterObject : public InterfaceObject
 {
-public:
+  public:
     IpParameterObject(DeviceObject& deviceObject, Platform& platform);
     void readProperty(PropertyID id, uint32_t start, uint32_t& count, uint8_t* data);
     void writeProperty(PropertyID id, uint8_t start, uint8_t* data, uint8_t count);
@@ -17,10 +17,12 @@ public:
 
     uint32_t multicastAddress() const;
     uint8_t ttl() const { return _ttl; }
-protected:
+
+  protected:
     uint8_t propertyCount();
     PropertyDescription* propertyDescriptions();
-private:
+
+  private:
     uint16_t _projectInstallationId = 0;
     uint8_t _ipAssignmentMethod = 0;
     uint8_t _ipCapabilities = 0;
@@ -29,7 +31,7 @@ private:
     uint32_t _defaultGateway = 0;
     uint32_t _multicastAddress = 0;
     uint8_t _ttl = 60;
-    char _friendlyName[30] = { 0 };
+    char _friendlyName[30] = {0};
     DeviceObject& _deviceObject;
     Platform& _platform;
 
diff --git a/src/knx/memory.h b/src/knx/memory.h
index f13ccae..b9831ec 100644
--- a/src/knx/memory.h
+++ b/src/knx/memory.h
@@ -18,7 +18,7 @@ public:
 private:
     Platform& _platform;
     bool _modified = false;
-    SaveRestore* _saveRestores[MAXSAVE];
+    SaveRestore* _saveRestores[MAXSAVE] = {0};
     int _saveCount = 0;
     uint8_t* _data = 0;
 };
diff --git a/src/knx/network_layer.h b/src/knx/network_layer.h
index cc94b31..2386469 100644
--- a/src/knx/network_layer.h
+++ b/src/knx/network_layer.h
@@ -8,20 +8,20 @@ class DataLinkLayer;
 
 class NetworkLayer
 {
-public:
+  public:
     NetworkLayer(TransportLayer& layer);
-    
+
     void dataLinkLayer(DataLinkLayer& layer);
     uint8_t hopCount() const;
     void hopCount(uint8_t value);
 
     // from data link layer
     void dataIndication(AckType ack, AddressType addType, uint16_t destination, FrameFormat format, NPDU& npdu,
-        Priority priority, uint16_t source);
+                        Priority priority, uint16_t source);
     void dataConfirm(AckType ack, AddressType addressType, uint16_t destination, FrameFormat format, Priority priority,
-        uint16_t source, NPDU& npdu, bool status);
+                     uint16_t source, NPDU& npdu, bool status);
     void systemBroadcastIndication(AckType ack, FrameFormat format, NPDU& npdu,
-        Priority priority, uint16_t source);
+                                   Priority priority, uint16_t source);
     void systemBroadcastConfirm(AckType ack, FrameFormat format, Priority priority, uint16_t source, NPDU& npdu, bool status);
 
     // from transport layer
@@ -30,9 +30,9 @@ public:
     void dataBroadcastRequest(AckType ack, HopCountType hopType, Priority priority, TPDU& tpdu);
     void dataSystemBroadcastRequest(AckType ack, HopCountType hopType, Priority priority, TPDU& tpdu);
 
-private:
-    void sendDataRequest(TPDU &tpdu, HopCountType hopType, AckType ack, uint16_t destination, Priority priority, AddressType addrType);
+  private:
+    void sendDataRequest(TPDU& tpdu, HopCountType hopType, AckType ack, uint16_t destination, Priority priority, AddressType addrType);
     uint8_t _hopCount = 6;
-    DataLinkLayer* _dataLinkLayer;
+    DataLinkLayer* _dataLinkLayer = 0;
     TransportLayer& _transportLayer;
 };
diff --git a/src/knx/npdu.h b/src/knx/npdu.h
index b069809..72f6164 100644
--- a/src/knx/npdu.h
+++ b/src/knx/npdu.h
@@ -22,6 +22,6 @@ class NPDU
     NPDU(uint8_t* data, CemiFrame& frame);
 
   private:
-    uint8_t* _data;
+    uint8_t* _data = 0;
     CemiFrame& _frame;
 };
\ No newline at end of file
diff --git a/src/knx/save_restore.h b/src/knx/save_restore.h
index 31bba83..f87091d 100644
--- a/src/knx/save_restore.h
+++ b/src/knx/save_restore.h
@@ -6,7 +6,7 @@
  */
 class SaveRestore
 {
-public:
+  public:
     /**
      * This method is called when the object should save its state to the buffer.
      *  
diff --git a/src/knx/tpdu.h b/src/knx/tpdu.h
index 0760d53..b3fe767 100644
--- a/src/knx/tpdu.h
+++ b/src/knx/tpdu.h
@@ -31,6 +31,6 @@ class TPDU
     TPDU(uint8_t* data, CemiFrame& frame);
 
   private:
-    uint8_t* _data;
+    uint8_t* _data = 0;
     CemiFrame& _frame;
 };
diff --git a/src/linux_platform.h b/src/linux_platform.h
index 404325b..4881d8a 100644
--- a/src/linux_platform.h
+++ b/src/linux_platform.h
@@ -51,15 +51,15 @@ public:
     void cmdlineArgs(int argc, char** argv);
 
   private:
-    uint32_t _multicastAddr;
-    uint16_t _port;
+    uint32_t _multicastAddr = -1;
+    uint16_t _port = -1;
     int _socketFd = -1;
     void doMemoryMapping();
-    uint8_t* _mappedFile;
+    uint8_t* _mappedFile = 0;
     int _fd = -1;
     uint8_t* _currentMaxMem = 0;
     std::string _flashFilePath = "flash.bin";
-    char** _args;
+    char** _args = 0;
 };
 
 #endif
\ No newline at end of file