How to compare gathered barcode with determined code

Projects General Guidance
3

Don't mind the method wiegen()

#include <LiquidCrystal_I2C.h>
#include <avr/pgmspace.h> 
#include <Usb.h>
#include <hidboot.h>
#include <hiduniversal.h>
#include "HX711.h"
#include "UsbCore.h"




#define DISPLAY_WIDTH 16
#include <Keyboard.h> 

LiquidCrystal_I2C lcd(0x3F, 16 ,2); 
HX711 cell (A1, A0);


USB     Usb;
//USBHub     Hub(&Usb);
HIDUniversal Hid(&Usb);
long count = 0;
float val = 0;
float gewicht = 0;
char keys[14] = {'e',9,1,2,0,0,0,5,8,1,1,4,6,1};
char key;




 
class KbdRptParser : public KeyboardReportParser
{
        void PrintKey(uint8_t mod, uint8_t key);
protected:
  virtual void OnKeyDown  (uint8_t mod, uint8_t key);
  virtual void OnKeyPressed(uint8_t key);
  
  
};
 
void KbdRptParser::OnKeyDown(uint8_t mod, uint8_t key)  
{
    uint8_t c = OemToAscii(mod, key);
 
    if (c)
        OnKeyPressed(c);
}
 
/* what to do when symbol arrives */
void KbdRptParser::OnKeyPressed(uint8_t schluessel)  
{
static uint32_t next_time = 0;      //watchdog
static uint8_t current_cursor = 0;  //tracks current cursor position  
 
    if( millis() > next_time ) {
      lcd.clear();
      current_cursor = 0;
      lcd.setCursor( 0,0 );
    }//if( millis() > next_time ...
 
    next_time = millis() + 200;  //reset watchdog
 
    if( current_cursor++ == ( DISPLAY_WIDTH + 1 )) {  //switch to second line if cursor outside the screen
      lcd.setCursor( 0,1 );
    }
 
    key= char(schluessel);
    lcd.print( key );
    Serial.print(key);
     
  }
  ;
 
KbdRptParser Prs;

float wiegen(){
  count = count + 1;
  //val = ((count-1)/count) * val + (1/count)*cell.read();
  //val = 0.5 * val + 0.5* cell.read();
  val = cell.read();
  gewicht = ((val - 8584390 ) / (35846.0f / 75));
  //null 8584390
  return gewicht;
}
 
void setup()
{
    Serial.begin( 9600 );
    
 
    if (Usb.Init() == -1) {
        Serial.println("OSC did not start.");
    }
 
    delay( 200 );
 
    Hid.SetReportParser(0, &Prs);
    
    // set up the LCD's number of columns and rows: 
    lcd.begin();
    lcd.clear();
    lcd.noAutoscroll();
    lcd.print("Bereit:");
    delay( 200 );
    
    
}
 
void loop()
{
  Usb.Task();
 

 
}