diff --git a/vscode/OmobiLEDdisplayBluetooth/include/BluetoothLeUartServer.h b/vscode/OmobiLEDdisplayBluetooth/include/BluetoothLeUartServer.h
index 5421e4c..f957974 100644
--- a/vscode/OmobiLEDdisplayBluetooth/include/BluetoothLeUartServer.h
+++ b/vscode/OmobiLEDdisplayBluetooth/include/BluetoothLeUartServer.h
@@ -62,6 +62,8 @@ public:
     bool getDeviceConnected();
     bool disconnectCurrentDevice();
 
+    String getDeviceAddress();
+
 protected:
     // callbacks for BLEServer
     void onConnect(BLEServer *pServer, esp_ble_gatts_cb_param_t *param) override;
diff --git a/vscode/OmobiLEDdisplayBluetooth/include/EepromManager.h b/vscode/OmobiLEDdisplayBluetooth/include/EepromManager.h
index e38964e..ce1b5f5 100644
--- a/vscode/OmobiLEDdisplayBluetooth/include/EepromManager.h
+++ b/vscode/OmobiLEDdisplayBluetooth/include/EepromManager.h
@@ -27,25 +27,22 @@ private:
     template <typename T>
     const T &writeToEeprom(int address, size_t size, const T &t)
     {
-        Serial.println("Writing at: " + String(address) + " size: " + String(sizeof(T)));
 
         if (sizeof(T) > size) {
-            Serial.println("Error writing: Size should be: " + String(size));
+            Serial.println("[Error][EepromManager] writing: Size should be: " + String(size) + " but was: " + String(sizeof(T)));
             return t;
         }
 
         const T &res = EEPROM.put(address, t);
-        Serial.println("Eeprom commit returned: " + String(EEPROM.commit()));
+        EEPROM.commit();
         return res;
     }
 
     template <typename T>
     T &readFromEeprom(int address, size_t size, T &t)
     {
-        Serial.println("Reading at: " + String(address) + " size: " + String(sizeof(T)));
-
         if (sizeof(T) > size) {
-            Serial.println("Error reading: Size should be: " + String(size));
+            Serial.println("[Error][EepromManager] reading: Size should be: " + String(size) + " but was: " + String(sizeof(T)));
             return t;
         }
 
diff --git a/vscode/OmobiLEDdisplayBluetooth/src/BluetoothLeUartServer.cpp b/vscode/OmobiLEDdisplayBluetooth/src/BluetoothLeUartServer.cpp
index 6ed7215..f6ec47a 100644
--- a/vscode/OmobiLEDdisplayBluetooth/src/BluetoothLeUartServer.cpp
+++ b/vscode/OmobiLEDdisplayBluetooth/src/BluetoothLeUartServer.cpp
@@ -56,6 +56,27 @@ void BluetoothLeUartServer::sendData(String data)
     txCharacteristic->notify();
 }
 
+bool BluetoothLeUartServer::getDeviceConnected()
+{
+    return this->deviceConnected;
+}
+
+bool BluetoothLeUartServer::disconnectCurrentDevice() {
+    if(!this->getDeviceConnected())
+        return false;
+
+    this->bleServer->disconnect(this->deviceConnectionId);
+    return true;
+}
+
+String BluetoothLeUartServer::getDeviceAddress() {
+    
+    String address = BLEDevice::getAddress().toString().c_str();
+    address.toUpperCase();
+
+    return address;
+}
+
 void BluetoothLeUartServer::onConnect(BLEServer* pServer, esp_ble_gatts_cb_param_t *param)
 {
     // only allow one device
@@ -84,17 +105,4 @@ void BluetoothLeUartServer::onWrite(BLECharacteristic *rxCharacteristic)
 {
     if (this->callbacks != nullptr)
         this->callbacks->onDataReceived(rxCharacteristic->getValue().c_str());
-}
-
-bool BluetoothLeUartServer::getDeviceConnected()
-{
-    return this->deviceConnected;
-}
-
-bool BluetoothLeUartServer::disconnectCurrentDevice() {
-    if(!this->getDeviceConnected())
-        return false;
-
-    this->bleServer->disconnect(this->deviceConnectionId);
-    return true;
 }
\ No newline at end of file
diff --git a/vscode/OmobiLEDdisplayBluetooth/src/EepromManager.cpp b/vscode/OmobiLEDdisplayBluetooth/src/EepromManager.cpp
index 5deb52d..22c7370 100644
--- a/vscode/OmobiLEDdisplayBluetooth/src/EepromManager.cpp
+++ b/vscode/OmobiLEDdisplayBluetooth/src/EepromManager.cpp
@@ -8,7 +8,6 @@ EepromManager::EepromManager()
 
 EepromUnit *EepromManager::registerEempromUnit(size_t size)
 {
-    Serial.println("Registering new EepromUnit with size: " + String(size) + " at " + String(this->currentAddressEnding));
     // create a new Unit at the current address ending
     EepromUnit *newUnit = new EepromUnit(this, this->currentAddressEnding, size);
     // move the new address ending
diff --git a/vscode/OmobiLEDdisplayBluetooth/src/OmobiLedDisplay.cpp b/vscode/OmobiLEDdisplayBluetooth/src/OmobiLedDisplay.cpp
index 7367518..bc85f0b 100644
--- a/vscode/OmobiLEDdisplayBluetooth/src/OmobiLedDisplay.cpp
+++ b/vscode/OmobiLEDdisplayBluetooth/src/OmobiLedDisplay.cpp
@@ -65,18 +65,21 @@ void OmobiLedDisplay::onDataReceived(String dataString)
     OmobiDisplayStatusCode replyStatus = InternalError;
     JsonObject replyData = replyDoc.createNestedObject("data");
 
-    if (requestHeader != AuthorizeSessionCommand && !this->sessionAuthorized)
+    if (requestHeader > KeepAliveCommand && !this->sessionAuthorized)
         replyStatus = Unauthorized;
     else
         switch (requestHeader)
         {
         case AuthorizeSessionCommand:
         {
+            String combinedCode = this->bleServer->getDeviceAddress() + String(this->properties.deviceCode);
+            String secret = this->sha256(combinedCode);
+
             if (this->sessionAuthorized)
             {
                 replyStatus = Success;
             }
-            else if (requestData["secret"] == this->sha256(this->properties.deviceCode))
+            else if (requestData["secret"] == secret)
             {
                 replyStatus = Success;
                 this->sessionAuthorized = true;
diff --git a/vscode/OmobiLEDdisplayBluetooth/src/main.cpp b/vscode/OmobiLEDdisplayBluetooth/src/main.cpp
index ba685d7..919e2d6 100644
--- a/vscode/OmobiLEDdisplayBluetooth/src/main.cpp
+++ b/vscode/OmobiLEDdisplayBluetooth/src/main.cpp
@@ -13,7 +13,7 @@ void setup()
   Adafruit_NeoMatrix *displayMatrix = new Adafruit_NeoMatrix(
       8,
       8,
-      1,
+      2,
       1,
       PIN,
       NEO_TILE_TOP + NEO_TILE_LEFT + NEO_TILE_ROWS + NEO_TILE_PROGRESSIVE +