diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b90e4a7..73d89ed 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -68,6 +68,8 @@ set(SOURCES
 ./knx/group_object/dpt/dpt14.h
 ./knx/group_object/dpt/dpt15.cpp
 ./knx/group_object/dpt/dpt15.h
+./knx/group_object/dpt/dpt16.cpp
+./knx/group_object/dpt/dpt16.h
 ./knx/group_object/dpt/dptconvert.cpp
 ./knx/group_object/dpt/dptconvert.h
 ./knx/group_object/group_object.cpp
diff --git a/src/knx/group_object/dpt/dpt.h b/src/knx/group_object/dpt/dpt.h
index b804dc5..e59e2b2 100644
--- a/src/knx/group_object/dpt/dpt.h
+++ b/src/knx/group_object/dpt/dpt.h
@@ -3,8 +3,6 @@
 #include "../group_object.h"
 namespace Knx
 {
-#define DPT_String_ASCII Dpt(16, 0)
-#define DPT_String_8859_1 Dpt(16, 1)
 #define DPT_SceneNumber Dpt(17, 1)
 #define DPT_SceneControl Dpt(18, 1)
 #define DPT_DateTime Dpt(19, 1)
diff --git a/src/knx/group_object/dpt/dpt16.cpp b/src/knx/group_object/dpt/dpt16.cpp
new file mode 100644
index 0000000..58e6960
--- /dev/null
+++ b/src/knx/group_object/dpt/dpt16.cpp
@@ -0,0 +1,78 @@
+#include "dpt16.h"
+
+#include "dptconvert.h"
+#include <cstring>
+
+Knx::Dpt16::Dpt16()
+{
+    memset(_value, 0, 15);
+}
+
+Knx::Dpt16::Dpt16(const char* value) : Dpt16()
+{
+    this->value(value);
+}
+
+Knx::Go_SizeCode Knx::Dpt16::size() const
+{
+    return Go_14_Octets;
+}
+
+void Knx::Dpt16::encode(uint8_t* data) const
+{
+    uint8_t val = _value[0];
+
+    for (int n = 0; n < 14; n++)
+    {
+        if (val)
+            val = _value[n]; //string terminator 0x00 will stop further assignments and init the remainig payload with zero
+
+        unsigned8ToPayload(data, n, val, 0xff);
+    }
+}
+
+bool Knx::Dpt16::decode(uint8_t* data)
+{
+
+    _value[14] = '\0';
+
+    for (int n = 0; n < 14; ++n)
+    {
+        _value[n] = signed8FromPayload(data, n);
+    }
+
+    return true;
+}
+
+const char* Knx::Dpt16::value() const
+{
+    return _value;
+}
+
+void Knx::Dpt16::value(const char* value)
+{
+    strncpy(_value, value, 14);
+    _value[14] = 0;
+}
+
+Knx::DPT_String_ASCII::DPT_String_ASCII() : Dpt16() {}
+
+Knx::DPT_String_ASCII::DPT_String_ASCII(const char* value) : Dpt16(value) {}
+
+bool Knx::DPT_String_ASCII::decode(uint8_t* data)
+{
+    _value[14] = '\0';
+
+    for (int n = 0; n < 14; ++n)
+    {
+        _value[n] = signed8FromPayload(data, n);
+
+        if ((_value[n] & 0x80))
+        {
+            _value[0] = 0;
+            return false;
+        }
+    }
+
+    return true;
+}
diff --git a/src/knx/group_object/dpt/dpt16.h b/src/knx/group_object/dpt/dpt16.h
new file mode 100644
index 0000000..01b1b4a
--- /dev/null
+++ b/src/knx/group_object/dpt/dpt16.h
@@ -0,0 +1,32 @@
+#pragma once
+#include "dpt.h"
+namespace Knx
+{
+    class Dpt16: public Dpt
+    {
+            enum ReadDirectionValue { LeftToRight = 0, RightToLeft = 1};
+        public:
+            Dpt16();
+            Dpt16(const char* value);
+            Go_SizeCode size() const override;
+
+            void encode(uint8_t* data) const override;
+            bool decode(uint8_t* data) override;
+
+            const char* value() const;
+            void value(const char* value);
+        protected:
+            // one character more than the dpt to store \0
+            char _value[15];
+    };
+
+    typedef Dpt16 DPT_String_8859_1;
+
+    class DPT_String_ASCII: public Dpt16
+    {
+        public:
+            DPT_String_ASCII();
+            DPT_String_ASCII(const char* value);
+            bool decode(uint8_t* data) override;
+    };
+}
\ No newline at end of file
diff --git a/src/knx/group_object/dpt/dptconvert.cpp b/src/knx/group_object/dpt/dptconvert.cpp
index cacf6a2..4d53756 100644
--- a/src/knx/group_object/dpt/dptconvert.cpp
+++ b/src/knx/group_object/dpt/dptconvert.cpp
@@ -18,10 +18,6 @@ namespace Knx
     {
         if (payload_length > 0)
         {
-            // DPT 16.* - String
-            if (datatype.mainGroup == 16 && datatype.subGroup <= 1 && !datatype.index)
-                return busValueToString(payload, payload_length, datatype, value);
-
             // DPT 17.* - Scene Number
             if (datatype.mainGroup == 17 && datatype.subGroup == 1 && !datatype.index)
                 return busValueToScene(payload, payload_length, datatype, value);
@@ -104,10 +100,6 @@ namespace Knx
 
     int KNX_Encode_Value(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype)
     {
-        // DPT 16.* - String
-        if (datatype.mainGroup == 16 && datatype.subGroup <= 1 && !datatype.index)
-            return valueToBusValueString(value, payload, payload_length, datatype);
-
         // DPT 17.* - Scene Number
         if (datatype.mainGroup == 17 && datatype.subGroup == 1 && !datatype.index)
             return valueToBusValueScene(value, payload, payload_length, datatype);
@@ -598,22 +590,6 @@ namespace Knx
         return true;
     }
 
-    int valueToBusValueString(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype)
-    {
-        const char* strValue = value;
-        uint8_t val = strValue[0];
-
-        for (int n = 0; n < 14; n++)
-        {
-            if (val)
-                val = strValue[n]; //string terminator 0x00 will stop further assignments and init the remainig payload with zero
-
-            unsigned8ToPayload(payload, n, val, 0xff);
-        }
-
-        return true;
-    }
-
     int valueToBusValueScene(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype)
     {
         if ((int64_t)value < INT64_C(0) || (int64_t)value > INT64_C(63))
diff --git a/src/knx/group_object/dpt/dptconvert.h b/src/knx/group_object/dpt/dptconvert.h
index 3d7b31b..6861ad1 100644
--- a/src/knx/group_object/dpt/dptconvert.h
+++ b/src/knx/group_object/dpt/dptconvert.h
@@ -49,7 +49,6 @@ namespace Knx
     //KNX to internal
     int busValueToUnsigned32(const uint8_t* payload, size_t payload_length, const Dpt& datatype, KNXValue& value);
     int busValueToSigned32(const uint8_t* payload, size_t payload_length, const Dpt& datatype, KNXValue& value);
-    int busValueToString(const uint8_t* payload, size_t payload_length, const Dpt& datatype, KNXValue& value);
     int busValueToScene(const uint8_t* payload, size_t payload_length, const Dpt& datatype, KNXValue& value);
     int busValueToSceneControl(const uint8_t* payload, size_t payload_length, const Dpt& datatype, KNXValue& value);
     int busValueToSceneInfo(const uint8_t* payload, size_t payload_length, const Dpt& datatype, KNXValue& value);
@@ -71,7 +70,6 @@ namespace Knx
     //Internal to KNX
     int valueToBusValueUnsigned32(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype);
     int valueToBusValueSigned32(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype);
-    int valueToBusValueString(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype);
     int valueToBusValueScene(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype);
     int valueToBusValueSceneControl(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype);
     int valueToBusValueSceneInfo(const KNXValue& value, uint8_t* payload, size_t payload_length, const Dpt& datatype);
diff --git a/src/knx/group_object/dpt/dpts.h b/src/knx/group_object/dpt/dpts.h
index 3f783d9..3b69f8a 100644
--- a/src/knx/group_object/dpt/dpts.h
+++ b/src/knx/group_object/dpt/dpts.h
@@ -14,4 +14,5 @@
 #include "dpt12.h"
 #include "dpt13.h"
 #include "dpt14.h"
-#include "dpt15.h"
\ No newline at end of file
+#include "dpt15.h"
+#include "dpt16.h"
\ No newline at end of file