HOW TO SEND / RECEIVE STRINGS between FLASH AND ARDUINO ?

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// I d like to pass a number (id) to the arduino attached to this computer
// so this id could spread via XBee to another arduino which needs this number
// to response with a string.
// Dozo, See the code where HELP is NEEDED.

package {
    import flash.utils.Timer;
    import flash.display.Sprite;
    import flash.events.Event;
    import funnel.*;
    
    public class FlashTest extends Sprite {
        
        private var arduino:Arduino;
                
        public function FlashTest() { 
               
            // PASS THIS NUMBER VIA XBee (the XBee part is working ok)
            var id:uint = 11; //could be any number...
            
            //PASS THE NUMBER AT EACH SECOND (LOOPING)           
            var intervalo:Timer = new Timer(1000);
            intervalo.start();
            intervalo.addEventListener(TimerEvent.TIMER,sendID);
            
            // ???? HELP IS NEEDED HERE
            function sendID(e:Event):void{
                // I mean arduino to keep sending this ID number to serial as if I had programed:
                //      void loop(){
                //         Serial.print(id)
                //      }
                // in Arduino itself.
                arduino.sendString(id);        //<----------------- this is invention            
                 
                 //call the function to retrive the string from serial
                 getString();
            }
            
            // ???? HELP IS NEEDED HERE
                // arduino will receive strings from serial after succefully send an ID number to serial
                // it is a string like this: "12,14,102332,"
            
            function getString():void{
             
                var response:String = arduino.serialRead();    //<----------------- this is invention 
                
                // ...and trace it;
                trace(response);   //it should trace ("12,14,102332") each time there is available data at serial;
                        
                //I dont even know if firmata is really needed since all I want is to retrive strings from serial to flash.
      
           }
        }
    }
}