diff --git a/src/knx/group_object/dpt/dpt.h b/src/knx/group_object/dpt/dpt.h
index c87fb49..0e8fb5f 100644
--- a/src/knx/group_object/dpt/dpt.h
+++ b/src/knx/group_object/dpt/dpt.h
@@ -330,4 +330,37 @@ namespace Knx
              */
             virtual bool decode(uint8_t* data) = 0;
     };
+
+    template<typename T> class DPT: public Dpt
+    {
+        public:
+            DPT() {};
+            DPT(T value)
+            {
+                _value = value;
+            }
+
+            virtual void value(T value)
+            {
+                _value = value;
+            }
+
+            T value() const
+            {
+                return _value;
+            }
+
+            operator T() const
+            {
+                return _value;
+            }
+
+            DPT& operator=(const T value)
+            {
+                _value = value;
+                return *this;
+            }
+        private:
+            T _value;
+    };
 }
\ No newline at end of file
diff --git a/src/knx/group_object/dpt/dpt1.cpp b/src/knx/group_object/dpt/dpt1.cpp
index 24d21b5..cc4e8e4 100644
--- a/src/knx/group_object/dpt/dpt1.cpp
+++ b/src/knx/group_object/dpt/dpt1.cpp
@@ -2,13 +2,6 @@
 
 #include "dptconvert.h"
 
-Knx::Dpt1::Dpt1() {}
-
-Knx::Dpt1::Dpt1(bool value)
-{
-    this->value(value);
-}
-
 Knx::Go_SizeCode Knx::Dpt1::size() const
 {
     return Go_1_Bit;
@@ -16,32 +9,11 @@ Knx::Go_SizeCode Knx::Dpt1::size() const
 
 void Knx::Dpt1::encode(uint8_t* data) const
 {
-    bitToPayload(data, 7, _value);
+    bitToPayload(data, 7, value());
 }
 
 bool Knx::Dpt1::decode(uint8_t* data)
 {
-    _value = bitFromPayload(data, 7);
+    value(bitFromPayload(data, 7));
     return true;
 }
-
-void Knx::Dpt1::value(bool value)
-{
-    _value = value;
-}
-
-bool Knx::Dpt1::value() const
-{
-    return _value;
-}
-
-Knx::Dpt1::operator bool() const
-{
-    return _value;
-}
-
-Knx::Dpt1& Knx::Dpt1::operator=(const bool value)
-{
-    _value = value;
-    return *this;
-}
diff --git a/src/knx/group_object/dpt/dpt1.h b/src/knx/group_object/dpt/dpt1.h
index 817b7f1..e15f7bf 100644
--- a/src/knx/group_object/dpt/dpt1.h
+++ b/src/knx/group_object/dpt/dpt1.h
@@ -2,22 +2,12 @@
 #include "dpt.h"
 namespace Knx
 {
-    class Dpt1: public Dpt
+    class Dpt1: public DPT<bool>
     {
         public:
-            Dpt1();
-            Dpt1(bool value);
             Go_SizeCode size() const override;
-
             void encode(uint8_t* data) const override;
             bool decode(uint8_t* data) override;
-
-            void value(bool value);
-            bool value() const;
-            operator bool() const;
-            Dpt1& operator=(const bool value);
-        private:
-            bool _value;
     };
 
     template<typename T> class DPT1 : public Dpt1
diff --git a/src/knx/group_object/dpt/dpt2.h b/src/knx/group_object/dpt/dpt2.h
index a9a6f28..74bf41b 100644
--- a/src/knx/group_object/dpt/dpt2.h
+++ b/src/knx/group_object/dpt/dpt2.h
@@ -9,7 +9,7 @@ namespace Knx
     {
         NoControl, Control
     };
-    template<typename T> class DPT2: public Dpt
+    template<typename T> class DPT2: public DPT<T>
     {
         public:
             Go_SizeCode size() const override
@@ -26,7 +26,7 @@ namespace Knx
                 }
 
                 bitToPayload(data, 6, true);
-                bitToPayload(data, 7, ((int)_value) == 1);
+                bitToPayload(data, 7, ((int)DPT<T>::value()) == 1);
             }
 
             bool decode(uint8_t* data) override
@@ -41,7 +41,7 @@ namespace Knx
 
                 bool v = bitFromPayload(data, 7);
 
-                _value = v ? (T)1 : (T)0;
+                value(v ? (T)1 : (T)0);
                 return true;
             }
 
@@ -55,16 +55,6 @@ namespace Knx
                 return _control;
             }
 
-            void value(T value)
-            {
-                _value = value;
-            }
-
-            T value() const
-            {
-                return _value;
-            }
-
         private:
             ControlValue _control;
             T _value;
diff --git a/src/knx/group_object/dpt/dpt4.cpp b/src/knx/group_object/dpt/dpt4.cpp
index c7bc861..8e94b50 100644
--- a/src/knx/group_object/dpt/dpt4.cpp
+++ b/src/knx/group_object/dpt/dpt4.cpp
@@ -2,13 +2,6 @@
 
 #include "dptconvert.h"
 
-Knx::Dpt4::Dpt4() {}
-
-Knx::Dpt4::Dpt4(char value)
-{
-    _value = value;
-}
-
 Knx::Go_SizeCode Knx::Dpt4::size() const
 {
     return Go_1_Octet;
@@ -16,36 +9,15 @@ Knx::Go_SizeCode Knx::Dpt4::size() const
 
 void Knx::Dpt4::encode(uint8_t* data) const
 {
-    unsigned8ToPayload(data, 0, _value, 0xFF);
+    unsigned8ToPayload(data, 0, value(), 0xFF);
 }
 
 bool Knx::Dpt4::decode(uint8_t* data)
 {
-    _value = signed8FromPayload(data, 0);
+    value(signed8FromPayload(data, 0));
     return true;
 }
 
-void Knx::Dpt4::value(char value)
-{
-    _value = value;
-}
-
-char Knx::Dpt4::value() const
-{
-    return _value;
-}
-
-Knx::Dpt4::operator char() const
-{
-    return _value;
-}
-
-Knx::Dpt4& Knx::Dpt4::operator=(const char value)
-{
-    _value = value;
-    return *this;
-}
-
 bool Knx::DPT_Char_ASCII::decode(uint8_t* data)
 {
     Dpt4::value(signed8FromPayload(data, 0) & 0x7F);
diff --git a/src/knx/group_object/dpt/dpt4.h b/src/knx/group_object/dpt/dpt4.h
index 739fe36..b46a6e1 100644
--- a/src/knx/group_object/dpt/dpt4.h
+++ b/src/knx/group_object/dpt/dpt4.h
@@ -2,22 +2,13 @@
 #include "dpt.h"
 namespace Knx
 {
-    class Dpt4: public Dpt
+    class Dpt4: public DPT<char>
     {
         public:
-            Dpt4();
-            Dpt4(char value);
             Go_SizeCode size() const override;
 
             void encode(uint8_t* data) const override;
             bool decode(uint8_t* data) override;
-
-            virtual void value(char value);
-            char value() const;
-            operator char() const;
-            Dpt4& operator=(const char value);
-        private:
-            char _value;
     };
 
     class DPT_Char_ASCII: public Dpt4