diff --git a/src/core/RandomAccessBinary.cpp b/src/core/RandomAccessBinary.cpp
index 31970aa..8e1c7dd 100644
--- a/src/core/RandomAccessBinary.cpp
+++ b/src/core/RandomAccessBinary.cpp
@@ -1,8 +1,16 @@
 #include "RandomAccessBinary.h"
+#include <memory>
 
 RandomAccessBinary::RandomAccessBinary()
 {
+    this->ptr_data = std::make_unique<vector<uint8_t>>();
+    this->ptr_data->reserve(1548);
+}
 
+RandomAccessBinary::RandomAccessBinary(uint possible_packetsize)
+{
+    this->ptr_data = std::make_unique<vector<uint8_t>>();
+    this->ptr_data->reserve(possible_packetsize);
 }
 
 RandomAccessBinary::~RandomAccessBinary()
@@ -10,84 +18,154 @@ RandomAccessBinary::~RandomAccessBinary()
 
 }
 
+const RandomAccessBinary::Endianness RandomAccessBinary::getEndianness()
+{
+    return this->endianness;
+}
+
 void RandomAccessBinary::setEndianess(RandomAccessBinary::Endianness endianess)
 {
-
+    this->endianness = endianess;
 }
 
 void RandomAccessBinary::setBytes(uint position, const std::vector<uint8_t> &data)
 {
-
+    for(uint i = 0; i < data.size(); ++i)
+        (*this->ptr_data)[position+i] = data[i];
 }
 
 void RandomAccessBinary::setByte(uint position, const uint8_t &data)
 {
-
+    (*this->ptr_data)[position] = data;
 }
 
 void RandomAccessBinary::setBit(uint64_t position, const bool &value)
 {
-
+    uint64_t bytePosition = position>>3;
+    uint bitPosition = position%8;
+    this->setBit(bytePosition, bitPosition, value);
 }
 
 void RandomAccessBinary::setBit(uint bytePosition, uint bitPosition, const bool &value)
 {
-
+    uint8_t byte = (*this->ptr_data)[bytePosition];
+    uint8_t newbyte = 1;
+    if (value)
+        newbyte = byte | (newbyte << (7-bitPosition));
+    else {
+        newbyte = byte & ~(newbyte << (7-bitPosition));
+    }
+    (*this->ptr_data)[bytePosition] = newbyte;
 }
 
-void RandomAccessBinary::setBits(uint64_t position, uint bits, const uint &value)
+void RandomAccessBinary::setBits(uint64_t position, uint bits, const uint8_t &value)
 {
-
+    uint64_t bytePosition = position>>3;
+    uint bitPosition = position%8;
+    this->setBits(bytePosition, bitPosition, bits, value);
 }
 
-void RandomAccessBinary::setBits(uint bytePosition, uint bitPosition, const uint &value)
+void RandomAccessBinary::setBits(uint bytePosition, uint bitPosition, uint bits, const uint8_t &value)
 {
-
+    uint8_t byte = (*this->ptr_data)[bytePosition];
+    uint8_t newbyte = value;
+    uint8_t mask = 0;
+    for(uint i = bits-1; i >= 0; --i)
+        mask |= 1 << i;
+    mask <<= (7-bits-bitPosition);
+    byte &= ~mask;
+    newbyte <<= (7-bits-bitPosition);
+    byte |= newbyte;
+    (*this->ptr_data)[bytePosition] = byte;
 }
 
-void RandomAccessBinary::set_uint16(uint position, uint16_t data)
+void RandomAccessBinary::set_uint16(uint position, const uint16_t &data)
 {
-
+    if (this->endianness == Endianness::BIG) {
+        this->setByte(position, (uint8_t)(data >> 8));
+        this->setbyte(position+1, (uint8_t)(data & 0x0FF));
+    } else if (this->endianness == Endianness::LITTLE) {
+        this->setbyte(position, (uint8_t)(data & 0x0FF));
+        this->setByte(position+1, (uint8_t)(data >> 8));
+    } else {
+        //TODO
+    }
 }
 
-void RandomAccessBinary::set_uint32(uint position, uint32_t data)
+void RandomAccessBinary::set_uint32(uint position, const uint32_t &data)
 {
-
+    if (this->endianness == Endianness::BIG) {
+        this->setByte(position+0, (uint8_t)((data >> 24) & 0x0FF));
+        this->setByte(position+1, (uint8_t)((data >> 16) & 0x0FF));
+        this->setByte(position+2, (uint8_t)((data >> 8) & 0x0FF));
+        this->setbyte(position+3, (uint8_t)(data & 0x0FF));
+    } else if (this->endianness == Endianness::LITTLE) {
+        this->setByte(position+3, (uint8_t)((data >> 24) & 0x0FF));
+        this->setByte(position+2, (uint8_t)((data >> 16) & 0x0FF));
+        this->setByte(position+1, (uint8_t)((data >> 8) & 0x0FF));
+        this->setbyte(position+0, (uint8_t)(data & 0x0FF));
+    }
 }
 
-void RandomAccessBinary::set_uint64(uint position, uint64_t data)
+void RandomAccessBinary::set_uint64(uint position, const uint64_t &data)
 {
-
+    if (this->endianness == Endianness::BIG) {
+        this->setByte(position+0, (uint8_t)((data >> 56) & 0x0FF));
+        this->setByte(position+1, (uint8_t)((data >> 48) & 0x0FF));
+        this->setByte(position+2, (uint8_t)((data >> 40) & 0x0FF));
+        this->setByte(position+3, (uint8_t)((data >> 32) & 0x0FF));
+        this->setByte(position+4, (uint8_t)((data >> 24) & 0x0FF));
+        this->setByte(position+5, (uint8_t)((data >> 16) & 0x0FF));
+        this->setByte(position+6, (uint8_t)((data >> 8) & 0x0FF));
+        this->setbyte(position+7, (uint8_t)(data & 0x0FF));
+    } else if (this->endianness == Endianness::LITTLE) {
+        this->setByte(position+7, (uint8_t)((data >> 56) & 0x0FF));
+        this->setByte(position+6, (uint8_t)((data >> 48) & 0x0FF));
+        this->setByte(position+5, (uint8_t)((data >> 40) & 0x0FF));
+        this->setByte(position+4, (uint8_t)((data >> 32) & 0x0FF));
+        this->setByte(position+3, (uint8_t)((data >> 24) & 0x0FF));
+        this->setByte(position+2, (uint8_t)((data >> 16) & 0x0FF));
+        this->setByte(position+1, (uint8_t)((data >> 8) & 0x0FF));
+        this->setbyte(position+0, (uint8_t)(data & 0x0FF));
+    }
 }
 
-void RandomAccessBinary::set_float(uint position, float data)
+void RandomAccessBinary::set_float(uint position, const float &data)
 {
-
+    const uint32_t * conv = &data;
+    this->set_uint32(position, *conv);
 }
 
-void RandomAccessBinary::set_double(uint position, double data)
+void RandomAccessBinary::set_double(uint position, const double &data)
 {
-
+    const uint64_t * conv = &data;
+    this->set_uint64(position, *conv);
 }
 
 const uint8_t RandomAccessBinary::getByte(uint position)
 {
-
+    return (*this->ptr_data)[position];
 }
 
 const std::vector<const uint8_t> RandomAccessBinary::getBytes(uint position, uint length)
 {
-
+    std::vector<const uint8_t> vec;
+    for(uint i = position; i< position+length; ++i)
+        vec.push_back((*this->ptr_data)[i]);
+    return vec;
 }
 
 const bool RandomAccessBinary::getBit(uint byteOffset, uint bitOffset)
 {
-
+    uint8_t byte = (*this->ptr_data)[byteOffset];
+    return (byte & (1 << (7-bitOffset)) > 0;
 }
 
 const bool RandomAccessBinary::getBit(uint64_t position)
 {
-
+    uint64_t byteOffset = position>>3;
+    uint bitOffset = position%8;
+    return this->getbit(byteOffset, bitOffset);
 }
 
 const std::vector<const uint8_t> RandomAccessBinary::getBits(uint byteOffset, uint8_t bitOffset, uint64_t length)
diff --git a/src/core/RandomAccessBinary.h b/src/core/RandomAccessBinary.h
index e3bc3d5..723a8c3 100644
--- a/src/core/RandomAccessBinary.h
+++ b/src/core/RandomAccessBinary.h
@@ -7,14 +7,16 @@
 
 class RandomAccessBinary
 {
+public:
     enum class Endianness{
         BIG,
         LITTLE,
         MIDDLE
     };
 
-public:
+
     RandomAccessBinary();
+    RandomAccessBinary(uint possible_packetsize);
     explicit ~RandomAccessBinary();
 
     void setEndianness(Endianness endianess);
@@ -25,8 +27,8 @@ public:
 
     void setBit(uint64_t position, const bool& value);
     void setBit(uint bytePosition, uint bitPosition, const bool& value);
-    void setBits(uint64_t position, uint bits, const uint& value);
-    void setBits(uint bytePosition, uint bitPosition, const uint& value);
+    void setBits(uint64_t position, uint bits, const uint8_t& value);
+    void setBits(uint bytePosition, uint bitPosition, uint bits, const uint8_t& value);
 
     void set_uint16(uint position, const uint16_t& data);
     void set_uint32(uint position, const uint32_t& data);
@@ -62,6 +64,7 @@ public:
     std::string get_hex_string();
 private:
     std::unique_ptr<std::vector<uint8_t>> ptr_data;
+    Endianness endianness;
 };
 
 #endif // RANDOMACCESSBINARY_H