diff --git a/arduino-sony-minidisc-ir-remote.ino b/arduino-sony-minidisc-ir-remote.ino
index f057799..dc77f84 100644
--- a/arduino-sony-minidisc-ir-remote.ino
+++ b/arduino-sony-minidisc-ir-remote.ino
@@ -49,6 +49,99 @@
 
 //------------------------------------------------
 
+typedef struct
+{
+  char *key;
+  uint8_t value;
+} record_type;
+
+record_type upperCaseAlphaChar[26] = {
+    {"A", 0x1D},
+    {"B", 0x1E},
+    {"C", 0x1F},
+    {"D", 0x1B},
+    {"E", 0x1A},
+    {"F", 0x0},
+    {"G", 0x1},
+    {"H", 0x2},
+    {"I", 0x3},
+    {"J", 0x4},
+    {"K", 0x5},
+    {"L", 0x6},
+    {"M", 0x7},
+    {"N", 0x8},
+    {"O", 0x9},
+    {"P", 0x40},
+    {"Q", 0x41},
+    {"R", 0x42},
+    {"S", 0x43},
+    {"T", 0x44},
+    {"U", 0x45},
+    {"V", 0x46},
+    {"W", 0x47},
+    {"X", 0x48},
+    {"Y", 0x49},
+    {"Z", 0x4A}};
+
+record_type lowerCaseAlphaChar[26] = {
+    {"a", 0x1D},
+    {"b", 0x1E},
+    {"c", 0x1F},
+    {"d", 0x1B},
+    {"e", 0x1A},
+    {"f", 0x0},
+    {"g", 0x1},
+    {"h", 0x2},
+    {"i", 0x3},
+    {"j", 0x4},
+    {"k", 0x5},
+    {"l", 0x6},
+    {"m", 0x7},
+    {"n", 0x8},
+    {"o", 0x9},
+    {"p", 0x40},
+    {"q", 0x41},
+    {"r", 0x42},
+    {"s", 0x43},
+    {"t", 0x44},
+    {"u", 0x45},
+    {"v", 0x46},
+    {"w", 0x47},
+    {"x", 0x48},
+    {"y", 0x49},
+    {"z", 0x4A}};
+
+record_type numberChar[10] = {
+    {"1", 0x0},
+    {"2", 0x1},
+    {"3", 0x2},
+    {"4", 0x3},
+    {"5", 0x4},
+    {"6", 0x5},
+    {"7", 0x6},
+    {"8", 0x7},
+    {"9", 0x8},
+    {"0", 0x9}};
+
+record_type specialChar[8] = {
+    {"-", 0x4B},
+    {".", 0x4D},
+    {",", 0x4E},
+    {"/", 0xA},
+    {"?", 0x26},
+    {"!", 0x27},
+    {"(", 0x33},
+    {")", 0x34}};
+
+bool isLowercase = false;
+bool isNumber = false;
+
+//! Vielleicht smarter immer den vorherigen zu setzen und damit zu vergleichen
+bool wasLowercase = false;
+bool wasNumber = false;
+
+//------------------------------------------------
+
 // Create AsyncWebServer object on port 80
 AsyncWebServer server(80);
 // WiFiServer server(80);
@@ -226,6 +319,15 @@ void nameSingleTrack(String titlestring)
     int s = char_array[i];
     Serial.print("char: ");
     Serial.println(char_array[i]);
+
+    //! Hier müssen verschiedene Sachen getestet werden:
+    //! Ist das Array-Ende erreicht? Ist der case ein anderer als vom vorigen char? Prüft aktuelle char und entscheidet, welches Command gesendet wird
+    //! Wie kann ich das in eigene Funktionen verpacken?
+    // Test if char is a lowerCase letter
+    if (isLowerCase(char_array[i]))
+    {
+      Serial.println("The character is lower case");
+    }
   }
 }
 
@@ -258,6 +360,25 @@ void initWiFi()
 void setup()
 {
   Serial.begin(115200);
+
+  Serial.print("numberChar[1].value: ");
+  Serial.println(numberChar[1].value);
+  Serial.print("numberChar[1].key: ");
+  Serial.println(numberChar[1].key);
+
+  Serial.print("specialChar[0].value: ");
+  Serial.println(specialChar[0].value);
+  Serial.print("specialChar[0].key: ");
+  Serial.println(specialChar[0].key);
+
+  Serial.print("specialChar[2].value: ");
+  Serial.println(specialChar[2].value);
+
+  Serial.print("specialChar[7].value: ");
+  Serial.println(specialChar[7].value);
+  Serial.print("specialChar[7].key: ");
+  Serial.println(specialChar[7].key);
+
   initWiFi();
   initSDCard();