Index: sources/utility/format.cpp
===================================================================
diff -u -rae97f70129df818530bcb70c934c42fa28eb6034 -rfd9d9c1f190781f5ff1bc23a732f9424f9434002
--- sources/utility/format.cpp	(.../format.cpp)	(revision ae97f70129df818530bcb70c934c42fa28eb6034)
+++ sources/utility/format.cpp	(.../format.cpp)	(revision fd9d9c1f190781f5ff1bc23a732f9424f9434002)
@@ -39,6 +39,12 @@
     return string;
 }
 
+/*!
+ * \brief   Format::fromVariant
+ * \details This static method converts the defined types into QByteArray
+ * \param   vData - The value
+ * \return  The QByteAttay of the value vData if can't be converted 0xFF will be returned
+ */
 QByteArray Format::fromVariant(const QVariant &vData)
 {
     QByteArray mData;
@@ -55,24 +61,21 @@
     if ( vData.type() == static_cast<QVariant::Type>(QMetaType::Float) ||
          vData.type() == QVariant::Double ) {
         Types::F32 f32;
-        bool ok = false;
-        f32.value = vData.toFloat(&ok);
+        f32.value = vData.toFloat();
         Types::setValue(f32, mData);
         return mData;
     }
 
     if ( vData.type() == QVariant::UInt ) {
         Types::U32 u32;
-        bool ok = false;
-        u32.value = vData.toUInt(&ok);
+        u32.value = vData.toUInt();
         Types::setValue(u32, mData);
         return mData;
     }
 
     if ( vData.type() == QVariant::Int ) {
         Types::S32 s32;
-        bool ok = false;
-        s32.value = vData.toInt(&ok);
+        s32.value = vData.toInt();
         Types::setValue(s32, mData);
         return mData;
     }
@@ -85,7 +88,12 @@
         return mData;
     }
 
-    mData += vData.toUInt();
+    if ( vData.type() == QVariant::Bool ) {
+        mData += vData.toUInt();
+        return mData;
+    }
+
+    mData += 0xFF;
     return mData;
 }
 
Index: unittests/tst_utilities.cpp
===================================================================
diff -u -rae97f70129df818530bcb70c934c42fa28eb6034 -rfd9d9c1f190781f5ff1bc23a732f9424f9434002
--- unittests/tst_utilities.cpp	(.../tst_utilities.cpp)	(revision ae97f70129df818530bcb70c934c42fa28eb6034)
+++ unittests/tst_utilities.cpp	(.../tst_utilities.cpp)	(revision fd9d9c1f190781f5ff1bc23a732f9424f9434002)
@@ -160,14 +160,30 @@
     QCOMPARE(Format::fromVariant(vl).toHex(), ba.toHex());
 }
 
-void tst_utilities::tst_fromvariant_Else()
+void tst_utilities::tst_fromvariant_Bool_True()
 {
     bool b = true;
     QByteArray ba;
     ba += 0x01;
     QCOMPARE(Format::fromVariant(b).toHex(), ba.toHex());
 }
 
+void tst_utilities::tst_fromvariant_Bool_False()
+{
+    bool b = false;
+    QByteArray ba;
+    ba += '\0';
+    QCOMPARE(Format::fromVariant(b).toHex(), ba.toHex());
+}
+
+void tst_utilities::tst_fromvariant_Undefined()
+{
+    QTime t; // Any undefied type which is not defined in the Format::fromVariant
+    QByteArray ba;
+    ba += 0xFF;
+    QCOMPARE(Format::fromVariant(t.currentTime()).toHex(), ba.toHex());
+}
+
 void tst_utilities::tst_getValue_len()
 {
     Types::S32 vFlowSetPoint;
Index: unittests/tst_utilities.h
===================================================================
diff -u -rd3f916066c2d10c10fffa91fd8a7e5ac6dd86c7d -rfd9d9c1f190781f5ff1bc23a732f9424f9434002
--- unittests/tst_utilities.h	(.../tst_utilities.h)	(revision d3f916066c2d10c10fffa91fd8a7e5ac6dd86c7d)
+++ unittests/tst_utilities.h	(.../tst_utilities.h)	(revision fd9d9c1f190781f5ff1bc23a732f9424f9434002)
@@ -38,7 +38,9 @@
     void tst_fromvariant_Int_Pos();
     void tst_fromvariant_Int_Neg();
     void tst_fromvariant_List();
-    void tst_fromvariant_Else();
+    void tst_fromvariant_Bool_True();
+    void tst_fromvariant_Bool_False();
+    void tst_fromvariant_Undefined();
 
     void tst_safeIncrement_StepZero();
     void tst_safeIncrement_GtMaxValue_Step1 ();