Fio Xbee communication

Projects Programming
3

Here is the complete code I use (with the proper indentation!). I tried to make it simpler....Now the real thing:
Main:

int motorPin1 = 6;
int motorPin2 = 9;
int motorPin3 = 11;
int motorPin4 = 13;
int photoAV = 3;
int photoGA = 4;
int photoDR = 2;
int AV,GA,DR;
int incomingByte,; 
int led10 = 10;
int led12 = 12;

void setup() {
  pinMode(motorPin1, OUTPUT);
  pinMode(motorPin2, OUTPUT);
  pinMode(motorPin3, OUTPUT);
  pinMode(motorPin4, OUTPUT);
  Serial.begin(9600);
  pinMode(led10, OUTPUT); 
  pinMode(led12, OUTPUT); 
}
void moteur(int mot1, boolean mot2, int mot3, boolean mot4, int duree);
void moteuravance(int mot1, boolean mot2, int mot3, boolean mot4);
void lumiere();

void loop() {
  lumiere();
}

and then "lumiere" tab:

void lumiere()
{
  AV = analogRead(photoAV);
  GA = analogRead(photoGA);
  DR = analogRead(photoDR);
  if(AV > GA && AV > DR){ 
    Serial.print('H');
    delay(100); 
    digitalWrite(led10, LOW);
    digitalWrite(led12, LOW);
    moteur(0, false, 0, false, 500);
  }
  else{
    digitalWrite(led10, HIGH);
    digitalWrite(led12, LOW);
    Serial.print('L');
    delay(100); 
    if (Serial.available() > 0) {
      // read the oldest byte in the serial buffer:
      incomingByte = Serial.read();
      // if it's a capital H (ASCII 72), turn motors in one direction:
      if (incomingByte == 'H') {
        moteuravance(255, false, 0, true);
      }
      else if (incomingByte == 'L') {
        moteuravance(0, true, 255, false);
      }
      delay(100);
    }
  }
}

and "moteurs" tab:

void moteuravance(int mot1, boolean mot2, int mot3, boolean mot4)
{
  analogWrite(motorPin1, mot1);
  digitalWrite(motorPin2, mot2);
  analogWrite(motorPin3, mot3);
  digitalWrite(motorPin4, mot4);
}
void moteur(int mot1, boolean mot2, int mot3, boolean mot4, int duree)

{
  analogWrite(motorPin1, mot1);
  digitalWrite(motorPin2, mot2);
  analogWrite(motorPin3, mot3);
  digitalWrite(motorPin4, mot4);
  delay(duree);
}

Can you help me to understand why this code doesn't respond properly right a way and some delay is required for Fio1 to receive the "H" and "L" from Fio2?