Teensy 3.2 Together with "USB Host - Keyboard to ASCII Converter" Need help

[helmmen]

Hey everyone

Disclaimer: I am new here as you can see I am also a noob to this I like arduino's and only learned the bare basics at school nothing like connecting other side boards.

So what I am trying to do is make a teensy a Man in the middle module of a keyboard. I have connected the teensy to the a Usb Host
this one in specific. My problem arises with me not being able to read data from the usb host (simpely said I dont even know how to). I have connected the RX to TX and TX to RX (Serial3 pins 7 & 8 ) and everything powers up. How do I read the incoming ASCII chars and print them to the digital monitor. Below this I will give the code the guys from the Usb Host give you on reading and translating the ASCII chars to normal chars.

If someone could help me out with this and learn me the in's and out's of teensy's and connecting other boards I would be really happy.

char flag_esc=0;

void setup() {
  Serial.begin(9600);
  Serial.println("Type some characters and i will send them back");
}

void loop() {

  if (Serial.available() > 0) {
    int inByte = Serial.read();  
    if(inByte == 27)
    {
       flag_esc = 1;
    }   
    else
    {
      if(flag_esc==1)
      {
        // Previous char was ESC - Decode all the escaped keys
        switch(inByte)
        {
            case 0x49:
              Serial.print("[PgUp]");
              break;
            case 0x51:
              Serial.print("[PgDn]");
              break;    
            case 0x47:
              Serial.print("[Home]");
              break;
            case 0x4F:
              Serial.print("[End]");
              break;     
            case 0x52:
              Serial.print("[Ins]");
              break;
            case 0x53:
              Serial.print("[Del]");
              break;               
            case 0x3B:
              Serial.print("[F1]");
              break;
            case 0x3C:
              Serial.print("[F2]");
              break;    
            case 0x3D:
              Serial.print("[F3]");
              break;
            case 0x3E:
              Serial.print("[F4]");
              break;     
            case 0x3F:
              Serial.print("[F5]");
              break;
            case 0x40:
              Serial.print("[F6]");
              break;          
            case 0x41:
              Serial.print("[F7]");
              break; 
            case 0x42:
              Serial.print("[F8]");
              break; 
            case 0x43:
              Serial.print("[F9]");
              break; 
            case 0x44:
              Serial.print("[F10]");
              break; 
            case 0x57:
              Serial.print("[F11]");
              break; 
            case 0x58:
              Serial.print("[F12]");
              break;     
            case 0x48:
              Serial.print("[Up]");
              break; 
            case 0x50:
              Serial.print("[Down]");
              break; 
            case 0x4B:
              Serial.print("[Left]");
              break; 
            case 0x4D:
              Serial.print("[Right]");
              break;         
            case 0x54:
              Serial.print("[Print]");
              break; 
            case 0x5B:
              Serial.print("[Windows]");
              break;   
            default:
              Serial.print("[?]");
              break;            
        }
        flag_esc=0;    
      }
      else
      {  

        if(inByte==1)
        {
           Serial.print("Control-A");
        }  
        else if(inByte==2)
        {
           Serial.print("Control-B");
        }
        else if(inByte==3)
        {
           Serial.print("Control-C");
        }
        else if(inByte==4)
        {
           Serial.print("Control-D");
        }
        else if(inByte==5)
        {
           Serial.print("Control-E");
        }
        else if(inByte==6)
        {
           Serial.print("Control-F");
        }
        else if(inByte==7)
        {
           Serial.print("Control-G");
        }
        // Dont decode 8 - backspace
        else if(inByte==9)
        {
           Serial.print("Tab");
        }
        // Dont decode 10 - Line Feed
        else if(inByte==11)
        {
           Serial.print("Control-K");
        }
        else if(inByte==12)
        {
           Serial.print("Control-L");
        }
        // Dont decode 13 - Carriage Return
        else if(inByte==14)
        {
           Serial.print("Control-N");
        }
        else if(inByte==15)
        {
           Serial.print("Control-O");
        }
        else if(inByte==16)
        {
           Serial.print("Control-P");
        }
        else if(inByte==17)
        {
           Serial.print("Control-Q");
        }
        else if(inByte==18)
        {
           Serial.print("Control-R");
        }
        else if(inByte==19)
        {
           Serial.print("Control-S");
        }
        else if(inByte==20)
        {
           Serial.print("Control-T");
        }
        else if(inByte==21)
        {
           Serial.print("Control-U");
        }
        else if(inByte==22)
        {
           Serial.print("Control-V");
        }
        else if(inByte==23)
        {
           Serial.print("Control-W");
        }
        else if(inByte==24)
        {
           Serial.print("Control-X");
        }
        else if(inByte==25)
        {
           Serial.print("Control-Y");
        }        
        else if(inByte==26)
        {
           Serial.print("Control-Z");
        }

        else   
        {
          // Its a normal key
          Serial.write(inByte);
        }  
      }
    }  
  }     
}